I hated this feature until I realized I could just type the closing quote anyway and it wouldn't double up. Doesn't seem to bother me now that I'm used to it. Once in awhile my editor tries to get too clever and messes things up, but not often
That’s what GP said about “harder to model the editor’s behaviour mentally” though. In a dumb editor you type a quote and you get a quote, in a “smart” editor whether or not you get two quotes, one quote, or no quote at all is context dependent and more confusing.
