Nightlies shouldn't be used by those that want to use extensions or avoid crashes

I dunno. I use the nightlies at work... I don't use any extensions though.

+1 Missed the point but still sounded vaguely insightful?

You missed out the 'or' operator. The original statement was that IF (you want to use extensions OR you want to avoid crashes) THEN you shouldn't use nightlies. The followup said that he used the nightlies and avoided crashes just as well as with the stable release, although he didn't use extensions. So: wants to use extensions FALSE, wants to avoid crashes TRUE, and as it turns out nightlies work just fine. Hence OP's theorem is disproved by counterexample.

Really, this is basic Boolean logic. Anyone reading /. ought to understand this stuff...