I don't know of a single app that doesn't crash semi-regularly in Mac OS X 10.8.x

That includes every App Apple ships, which in my experience, crash far more often than 3rd party.

10.8 also seems to have shit-loads of USB issues, some of which I've been informed of by customers with third-party hardware. Related to my own hardware, I have to do some checking this weekend whether 10.8 supports USB low-power for my devices at 100mA. I think it might be turning them OFF completely when sleeping.

I don't see the situation getting any better with Apple having moved to a 1-year release cycle and fucking with so many low-level parts of the OS willy-nilly.