The caps are caps are caps are caps for a reason.
This doesn't necessarily apply to easy strength either. The absolute best progress i made was when I stuck with a training method for a LONG TIME that used slow progression. I.e. step loading. And here is the deal. It is not that training to failure, linear progression, basic periodization, rest pause, etc does not work. Far far from it. These methods all work great for me. The problem for me with failure training is I generally feel like dogshit most of the time. The visual and strength progress comes quickly but leaves just as quick. There is definite value to physical transformation with these methodologies but it just isn't my bag. I want to feel good MOST OF THE TIME. Training to failure for the sake of muscle growth does not support that goal.
I want to see how much a non hypertrophy program - easy strength - can introduce hypertrophy over a long period of time. Even given the low daily volume, the weekly volumes (50-70 reps per movement) with high intent and effort are not anything to sneeze at.
Part of the secret sauce I was missing in the last round due to injury were loaded carries and mobility - both during and after easy strength. I fucking love carries, and i think they are underrated as mass/cardio supplements to a basic strength program.
Use case on carries was my old power calisthenics program. I.e. 3x a week bodyweight only movements to failure and 2-3x a week farmers walks. I got weirdly big from this shit in my arms, traps, and legs despite the only weights used being the farmers walks (typically around bodyweight carries for 30min). I retired the same program a long time later with only the calisthenics. And wouldn't you know, I didnt gain shit for size. The strength in reps still increased at the same rate, but nothing grew and I found the actual contractions of motions didnt feel as solid.
The camp that is carries are bad for hypertrophy are looking at them from a stimulus fatigue ratio compared to classic lifting (i cant argue there) or using them as a just do this movement. Team carries are great for hypertrophy use them to compliment other lifting. Do your carries. Just do everything else too.