Haha my first thought was “I wonder if it’s possible to build a general purpose CPU out of 555 timers, then get DOOM running on that sucker.”

Of course, someone has already taken the first steps towards such a monstrosity.

https://hackaday.com/2021/12/17/implementing-a-cpu-using-555-timers-and-logic-synthesis/

Instability in my WIndows NT 4 development machine. I’d been using Linux as a hobbyist for several years, but switched to it at work so I had a machine that didn’t crash every few hours.