FWIW, I have rarely if ever seen OS X crash. I'm unsure what that would even look like. Are we talking about kernel panics? A single built-in app crashing while you using it? Every app suddenly closing?
Usually, when I've seen a kernel panic in the past 5-10 years it's due to poor third-party hardware or drivers. I know someone who has an external sound mixer and plugging/unplugging the USB gives a 50/50 chance of a kernel panic.
