Update on this:
So, like most people, I’ve been doing FTP tests on the trainer. My first TR FTP test came out at 247w back in March.
Then a month ago I did a Zwift portal climb and intervals.icu gave me an updated eFTP of 287w - potentially I needed a calibration here!
Today I did an outdoor 10mileTT (on a road bike with aero bars) in 24:53 with an average power of 246w. So as suspected I’m probably not over the 4w/kg threshold just yet (I’m 67kg) - but getting closer. I think some more specific training around this kind of time will help, most of the year I’ve been training for 10 hours rides so it’s quite different.
Congrats for your evolution!
I wouldn’t care too much about FTP numbers. Of course you need a ballpark, but your FTP today isn’t the same tomorrow. If you tested indoor vs outdoor. You profile, goals, etc. There are so many variables.
It appears that you go for long challenges, so I’d focus in sustained power for longer periods, and not in get 350w in a 20min test. That means nothing when you’re doing your 200km ride.
Some fair points there. It’s very easy to focus on FTP as a metric 
what is your trainer?
@Hugoyave I use an Elite Tuo. It’s a wheel on trainer. I have tested it against my power meter pedals and it is consistently 10w higher.
Got a really good price on it from eBay last year, £60 because they didn’t label it as new. Arrived in full unopened packaging.
Good thread. I picked up biking regularly around February after hip surgery last November. I was a hobbiest runner beforehand, so felt pretty good pacing myself and the effort for 20 min FTP tests. I took my first test in March at 3.2 w/kg, then 3.4 w/kg, and 3.6 w/kg in June, before my July race. I’m sure a lot of my gains have been the easier newbie gains. I started trainer road in May with a high volume polarized plan.
I’m 175 cm and hover around 72 kg. I’ve been weightlifting for 20+ years (I’m 36) so have a lot of muscle for the standard cyclist and am very low BF. I think I could maybe squeeze down to 70 kg with a lot of work and being crazy lean, but at the same time it’s very little effort to hover around 72 kg. The good news is that my strength training is already on point, so I continue with that. Although, if it wasn’t, that’s leave a lot more room for growth.
I’ll likely do another polarized plan this fall/winter. Right now I’m just building my own plan to maintain a bit. I feel like the 4 w/kg should be in reach within the next year.
Finally I made it, at least according to intervals.icu (though not wko5), 293W @ 71.6kg for 4.09W/kg 
Awesome - congratulations 
Hopefully but this eFTP was based on a 5 minute effort after 130 minutes of z2 with 3x2 minute earlier efforts which I did on rollers. It takes quite a bit of additional effort to not crash (which I did almost a few times) during such hard efforts so I might actually already be there.
Sounds like the JOIN workout I did yesterday. 
It probably is the same workout "koers simulatie " /“race simulation”
Join helped me improve a lot btw
Exact workout. So far, I am getting consistent improvement without mental/physical exhaustion. Seems to balance them both for me. Training for a May climbing event. Climbed above 3w/kg for the first time.
Reached 4.15W/kg during summer, again after 2 years. 70kg and 35 years. For me the volume pushed me over 4W/kg. A lot of hard work during winter on TR to get nea 4W/kg, then just a lot of unstructurd rides during summer, but increasing training hours from 6 to 10 per week.
I’ve only read the last 50 or so posts, so forgive me for not doing the whole thread!
I’m 31.5 months, 36500km and 1450 hrs back into cycling. I raced as a kid then had almost 20 years away from the bike and I’m now 40.
I’m at 4.3w/kg, with a body weight of around 101-102kg at 203cm. As others have said, I think consistency is the key. The only week I’ve ridden less than 200km this year was the first week of the year (I did about 160km, and felt the need for an easy week after a lot of volume in December). This is only outdoor cycling, all through the Swedish winter.
I feel that I still have a lot of progress to make. I’ve tried various sports over the years and I’ve always been very strong in aerobic performance. Can’t sprint to save my life, but can hold 400w plus for a really long time. I do some indoor rowing and resistance training too (can bench about 100kg and deadlift 160kg).
My race focus for next year is the UCI Gravel Worlds, and with it being a hilly course, I will try to peel the last of the fat from myself (there isn’t much) and maybe a bit of upper body muscle. If I got in with 95kg and a 450-460w FTP, I should be fairly useful in my age group.
The way it’s going, I feel that I’ll probably top out at 5w/kg at 95kg. I can’t see myself getting beyond that and I reckon it’ll take me another 2 years to get there. Then Father Time will start to make his presence felt and the long, steady decline will begin!
But I do appreciate that I’m fortunate to me approaching a mid 400s FTP after a little more than 2.5 years of training. I have worked bloody hard though.
Those are some monster numbers!! Congratulations!!
As someone who was recently around your same weight but trending down (currently 89kg) after some dietary changes, I’m curious if you still find it taxing to keep up with annoyingly stick skinny riders when the gradient kicks up? I’ve got a buddy who is (maybe) 145 lbs soaking wet, and he’s been that way since college (now he’s in his early 50s). Despite having crept somewhat close to 4w/kg in the past, I still could never drop him on any sort of steeper gradient, even when I could drop him on the flats somewhat handily when I got a gap. I’m getting back into a routine after a rough 1.5 years or so, with the goal of eventually hitting 4 w/kg. In my mind, I have these fanciful visions of being able to put him in the hurt locker a little bit on some climbs, but I’m trying to figure out if I’m just kidding myself.
I really like crazy join workouts like this one eg. madness? and everything goes? and other weird join workouts because the number of intervals is limited you can give a bit more and you don’t need to worry that the next time you will get an even harder workout. Last year my best ever 2h power was 2.7W/kg this year 3.2W/kg
So far it’s taking like 2 years…
but, just keeping at it brick by brick.
If the average gradient is below 6%, I can keep up with almost anyone. Beyond that, gravity and I fall out.
I was out riding with an elite level enduro rider last week (aged 19) and on the three climbs we did, he beat me by 3 seconds on the first (an 8 minute climb, for which I averaged 484w), 9 seconds on the second (about 5 minutes) and I beat him by a second on the third (a 4 minute climb).
But I really love climbing, and my technique on gravel is quite efficient.
Us heavier riders will always struggle to drop lightweights on climbs, but if we can gap them on the flat, the watts advantage is favourable for us
Is this by any chance the burner account of Magnus Backstedt? 
While I’m not quite as far over to the heavy side of the bell curve, at 83kg/360 watt FTP/ 4.3w/kg I definitely feel many of your points re: smaller riders. I think being a watt monster has its points though; assuming you can get reasonably aero, you should have a substantial advantage over lighter riders with similar w/kg on flat terrain. I find working a lot on VO2 and repeatability, so I can (barely) hang on up shorter climbs then recover and drop climbers on flatter terrain has worked well. We all have our strengths and “toolboxes”, and figuring out how to use it is part of the fun!
I was thinking a Matt Beers burner account with all the comments about how they enjoy climbing.