[zdragnar]

Buggy code that just crashes or produces incorrect results are a whole different category. In C a bug can compromise a server and your users. See the openssl heart bleed vulnerability as a prime example.

Once upon a time, you could put up a relatively vulnerable server, and unless you got a ton of traffic, there weren't too many things that would attack it. Nowadays, pretty much anything Internet facing will get a constant stream of probes. Putting up a server requires a stricter mindset than it used to.