Applications scale, not operating systems.

There was nothing magic in BeOS, simply multithreading that seemed novel at the time in consumer-level hardware.

Hate to say it, but there was no magic, just engineering that everyone now has.

Probably because it ran on PowerPC. If I remember my systems design class from 20 years ago, RISC makes implementing or scaling multiprocessing easier.

Intel processors essentially are RISC now internally. They just expose more complex instructions as a higher level API.

They are not RISC internally. In fact I read an interview with an intel engineer that an intel cou has >10,000 uops. That’s not in any sense reduced!

And it doesn’t make sense to apply the term ”risc” to internal CPU design anyway.

It ran pretty well on Intel also. And it originally ran on AT&T Hobbit, whatever the hell that was.