If you could write an OS from scratch...

Okay, so most every OS out there is C-based.  If you could magically write a complete hardware-controlling OS all the way up to the UI and applications using a different language, which would you choose?

Though I like Lisp, I think I'd have to choose Erlang, maybe NewSqueak for embedded/smaller systems.

http://www.losethos.com/
LoseThos will never have full networking support with an Internet browser, etc.
parentheses optional on calls with no arguments
LoseThos makes speaker noise during disk access on purpose
MAlloc
That's not confusing as fuck.
LoseThos partitions will appear as FAT32 to other operating systems, but will not work.  Do not access them from other operating systems.

the next linus torvalds