Tangential trivia: MRI Ruby still has compiler directives and, supposedly, support for the Atari ST. Always weird bumping into them when going around the codebase. No idea if it actually works or why it's even a thing.
RISC OS is still going (they just released a Raspberry Pi build) and OS/2 morphed into the commercial eComStation that is actively maintained. NeXT is dead though and Amiga fractured.
