[defqon]

This was actually a pretty well-used feature back around ~2010. The problem was that it was hidden away more and more every time the site was redesigned, so its discoverability (and presumably use) basically dropped to zero over time.

[dspillett]

I assumed it had already been quietly dropped, rather than just effectively hidden. It would be interesting to see how much use it actually gets these days.

[cameronbrown]

Yep. They dropped it a long long time ago and re-introduced this in 2017(?) as a different feature.