> short period from which you matured and and were able to appreciate adulthood

My high school and early college years were pretty rough (depression, suicidal, some substance abuse (couldn't access anything super serious)), but ho boy do I miss having time to casually build a compiler over a week of school holidays, spending all my afternoons fiddling with weird little coding things, and having zero concerns about any of it being fit for purpose or even useful and basicaly never feeling tired.

Being an adult is great but every year brings more accumulated responsibilities and that part kinda sucks. The days where I can get sucked into something interesting and forget time exists are becoming fewer and fewer. And the space of things that feel new and interesting diminishes surprisingly quickly too. The novelty wears off the more things you learn about