My server and laptops have never ever crashed. Not even when the root disk on the server asploded a little over a year ago. It made some unpleasant noises and the kernel log was flooded with IO errors, but you'd never notice anything was wrong just by using the website or FTP server.
The main workstatation used to crash once in awhile due to bugs in the driver for my HDTV tuner, but those bugs were fixed a few versions ago.
Linux = teh king of stability