Only if you're extremely confident adequate testing is in place – in any form, be it unit, smoke, user or whatever – to catch any potential regressions. Using version control does you no good if you don't catch the regression and roll back before customers are affected.
Oh heck yeah. We at HN are immersed in tech. Our experience is with companies whose core domain is tech and take things like source control for granted. But what about your local gym or sports franchise or restaurant chain or newspaper? There are millions of companies that don't have any kind of technical director or direction. Where some manager thought it would be a good idea to have a web site, and hired a programmer who's measured on how fast he can throw it together. What's a testing server? Heck, what's a server?
