I've had a great deal of success using a variety of training methods. A decade ago when I started this comeback I was on a modified Friel plan. And in the year before I started working with a coach I put up a 900 hour year, massive base. Great weight work. I won a ton of races. A bunch of point series titles. A season title on the track. States. Everything, I thought, pretty much except nats. But the truth is in the bigger masters races, including nats, I probably lacked the high end to ride the break. To bridge to the big boy break with the ex pro and the two former and current champions. I was not as good as those guys. Hindsight says I didn't win the cat 2 race at Somerville. I missed the break at Nats. I won the field sprint at Tather, but missed the winning break.
And even if I really didn't have that lack, or it was obtainable by adding it into summer training, the absolute truth is I did a ton of training then and there's no question I'm as good if not more gooder now. On wildly less hours. So plan B, for a guy who is too old to go pro and who's races are 45-90 minutes, with an outlier or two at a few hours, makes a hell of a lot more sense. There's not doubt that those 4 hour rides are more pleasant than some of the 90 minute suffer sessions on a tighter schedule, but of course suffering is also a limiter that can be trained.