Separate taps is also still a thing a thing because y'know it's a wash basin. You're meant to put the plug in and use the basin to collate a small pool of water for washing in.

Of course, this is pointless in public buildings where the thought of giving you a plug with which a juvenile delinquent could choose to flood the place with is out of the question.

I don't mind mixer taps or single taps though to be honest.