I stated programming games on a school computer in the early to mid 80’s. When the tape drive broke, I still used to have the code in my head, just type it all in for others to play. Now I find code I wrote last month and can’t remember doing it. At least it tends to be, “which genius wrote this” these day. Tend to leave comments everywhere for myself now, including my own name and other messages to myself like,“don’t touch this it works, your bug will be in…”