A few months ago I started a thread asking if hard panning would make a comeback.
It got a few replies, most saying that it still occurs quite a bit.
I don't hear it enough though.
The best recent example is "Trouble comes running" by Spoon.
Everything except the lead vocal is hard panned.
If you solo the left or right speaker, you hear 2 totally different mixes.
It's like a Beatles mix.
I mixed a song recently where all the drums, bass and piano were panned left. Guitars, backing vocals and all panned right (except for the reverb on the choir vocals, panned that one left). Lead vocal dead center.