I've done 4 professional rails apps and many personal ones. I've never had a problem keeping them running. Did you spend any time trying to figure out why they were crashing?
That said, even if you have a ton more professional experience than your response suggests, I don't trust people who say never glibly, nor does your question seem genuine.
You're implying the guy's a newb and it's him not the technology--just say as much.