Who's using MIPS these days? Retrogeeks excepted, of course.
As I noted elsewhere, at least as of a year or two ago MIPS was likely still outselling x86 in terms of volume (but x86 is still supreme in terms of revenue because all the other architectures have far lower average unit costs).
They're having a hard time keeping up, though.
Plan 9 is a research operating system, it's a platform to do fundamental operating system research. It is not a product, and its development is not shaped by commercial interest.
That being said, Coraid hardware runs Plan 9, it's embedded, you don't see it. They also make all their development on Plan 9.
http://plan9.bell-labs.com/wiki/plan9/faq/index.html#ABOUT_P...
EDIT: These are per year for all of them.
Either way, even if MIPS doesn't dominate anymore, it's still a huge market (probably more chips than x86), and will continue to be in the future (even though it might be shrinking).
