A couple of thoughts. First one over on the other thread:
Now keep in my mind I am a numbers guy with an engineering degree and two classes away from a dual degree in math. It’s hard to get more OCD about numbers.
Power on the bike while riding outside is not smooth, and its not reasonable to hit a single power target. Coggan came up with power zones (or levels in his words) to approximate what is going on in your body. They aren’t exact, are can vary day by day.
So if you really want to be OCD then run screaming from anyone or any workout display that makes you think hitting a precise power target is inherently better than hitting a range. I’m totally serious.