In all the 3 years that I have used Linux, I have never seen it crash once. Oh yeah I have seen a few programs running on it crash. But those are just programs and not the OS. I can just fire up the system monitor and kill the crashed program and thats it. No need to even restart the system.
Maybe thats why it is used in almost all the servers in the world that serve millions of requests at a time. A crash could be fatal.
Linux Warrior 