One story, from a novice. I recently quit SS far short of the gains I could’ve gotten from it and still weak, but not necessarily a “failure.”
As an older guy (42 y.o., overweight, untrained) with other commitments in my life, I couldn’t keep up with the recovery. Looking after two kids by myself, I can’t be falling asleep in the middle of the afternoon three days a week, which was starting to become normal.
Without a doubt, this is me, and not the program - for as long as I was able to keep up, the program worked exactly as advertised. I put on 10 pounds in 3 months, my shirts are fitting looser in the belly but tighter in the shoulders. It made me confident with my form in the major exercises and got me to the point that I could begin 5/3/1 with something besides an empty bar.
So you can probably file me under YNDTP, but in my case it’s worth it to switch to a plan where I can still run around with my kids and stay up past 8pm. Wish I’d had the interest and motivation I have now 10 years ago…