Get with the program. Get hydraulic brakes. They are superior in pretty much every way. My TT bike has rim brakes and it basically has zero braking in wet conditions and marginal braking in dry conditions. Not true with hydros. If you want to ride that bike for training and racing (which I do) then you’d be much better off with hydraulic brakes in my opinion. I’m an old guy, too, who raced for over four decades on rim brakes. Lots of old guys cling to rim brakes because they are stuck in the past. I’ve done both and here’s the key–I’m a really fast descender who lives where there’s descents. Hydro’s are far superior if (like everything mechanical) you keep them tuned and maintained. If you’re just doing flat, easy TTs, then take whatever is the best deal–but still make sure your brakes are tuned and maintained. ALWAYS RESPECT THE N=1 RULE–everyone is different.