I smoked weed as a young man. It was fun/interesting for a brief time, but one day I had an epiphany. It was just making me progressively more stupid. I couldn’t think as clearly, my mind was cloudy for days after getting high, I was becoming slow and lazy. That all should seem pretty obvious, but 21 year-olds learn slowly.
Anyway, one day I decided to stop, and haven’t touched it since.
I saw this happen to many friends. The ones that kept smoking it on a regular basis also seemed to be stalled as far as maturing.