[refenestrator]

Sure, but the flipside of that is that UNIX itself is fairly easy to port to a new CPU, due to being mostly written in C.

So port your compiler, figure out a syscall interface on your CPU, patch it into unix/libc and compile them, and.. it's not like that's a small amount of work but it's way easier than bootstrapping any other environment from scratch on a new architecture.

There's surely some amount of historical accident here as well, but no other language/OS combo ran on like 12 different architectures in the 80s.

[pjmlp]

Because no other timesharing OS was available in free beer source code for others to port it, it had nothing to do with C.