I am currently doing The full century plan. I actually do most rides indoors. This plan has lots of 4 hr Endurance+ rides. Even if I was outdoors, I would not do these. I find indoors that about 2.5 hours is as much as I want. If riding outdoors, I would never keep to those targets.
Previously I was doing the hilly grand Fondo plan. It was quite similar, I think a little better suited to what I like. I actually do most rides indoors.
For that reason I used to use the all purpose road plan. I found occasionally training load a little light, perhaps the early weeks of the plan. Also I found that there were too many cadence drills, usually twice a week, too many.
It would be nice to modify the plans to one’s wishes, and I probably occasionally change things. However sometimes have brought myself too much fatigue so it is not easy.
At present I am most likely to return to hilly grand Fondo.
I only do one day at weekend and have to move rides around. That’s ok , sometimes not enough rest at the times I need it.
Just a few random thoughts here, like to hear what people think