The Linux kernel doesn't crash much, unless you have dodgy drivers or dodgy hardware. Whether your userland programs crash or not depends on what you're running. I don't expect to see sshd crashing, for example, though it's true that almost any program will exit suddenly if the system runs out of memory, which to an ordinary user looks like a crash, though it's a very different thing really.

If you weren't talking about userland crashes, then your crack about "an OS on which crashing is expected behavior" makes no sense.

The comment was not meant to be taken all that seriously, of course, but an OS is more than just the kernel, and I do tend to disapprove of brushing a crash under the carpet.

System runs out of memory, various processes get terminated, and the easiest way to get it back into a good state is a restart: not that worrying, but do you have a memory leak? Some process segfaults with 54584554454d4f53 in the PC: should be investigated, not glossed over.