I am definitely on the same track. When the gym reopened I tried going back and doing higher intensity routines again after mostly sticking to smaller daily ones. Within about six weeks I had managed to blow through my fatigue threshold and it had a ripple effect on everything else(motivation, ability to learn, etc). Lesson learned, I now strive to hit "maintenance" workouts most of the time and then only do "training" occasionally so that I still experience some overload while also leaving myself some leftover energy. There is an 80/20 type of rule to be had.

I have been applying the "maintenance" attitude to a lot of things as well as exercise too. My whole approach to household matters is informed by this now - I think about most my consumer purchases in terms of the "low intensity, high volume" use case, and measuring what improves my life by looking for benchmarks that would improve passively by having the item. Best ROI here is to spend on storage, organization, and ergonomics, because that lets you assemble a workspace for something much quicker. Assigning some things to a tray or bin can make all the difference. If it's shoved in a pile, the activation energy goes way up, rendering everything you already have relatively less useful. This is true even if you barely have any stuff to begin with!