I think one of the Tandys were a 80186. that's about it for computers though
Windows 95 won't be possible until there's 386 emulation (as a bare minimum).
OA doesn't support whatever debian downstream does for an engine (we only support this). I'm assuming it's forcing that new unfinished default OpenGL2 renderer - which looked completely broken last time I checked on a Pi3.
Doom's a trustworthy landmark game for anything DOS. Chocolate Doom shouldn't render it irrelevant (it's still not quite dos doom perfect either)