The m.SO question posted by Mark is from July of last year; in October of last year, a number of SO's "hidden features" questions were closed and locked - and even as recently as a week ago, the one for Python was (re)closed.
The majority of their "big" hidden features questions seem to be closed and/or locked, but some are not; it doesn't seem to be quite a settled debate.
But, hey: we're not Stack Overflow, and I think we can make this one idiosyncrasy that we choose not to inherit.
