I didn't have a game engine on my Z80 Nascom-2 (1979-ish). I had to deal with concurrency using interrupts and assembler when I wrote a little maze game where

I didn't have a game engine on my Z80 Nascom-2 (1979-ish). I had to deal with concurrency using interrupts and assembler when I wrote a little maze game where the player was pursued by monsters. Until then I had only written a few programs in Basic. And lots of people program Arduinos and similar kit as their first attempt at coding now, are you going to tell them not to use concurrency?