> quitting vi is a basic competency test.

no, its pop quiz bullshit. Oh you know about ":wq"? Well done! But if you don't know, you do it a few times and now you know. It does nothing, outside of teaching you a bit about poor UX.

> if you haven't seen it, and needed it at least once, what have you been doing?

using one of the other available ides?

> once had an engineering VP bring up that a stray ":wq" in a document was a sign of a real engineer...working outside of where he should be..

That's not a sign of good judgement, that's a sign of being technically fashionable. It's hipster shit, akin to rejecting a candidate because they're a fan of Taylor Swift and don't know who the band Tool are.