Ah yes, 'old Kllingsor' was fond of a turn, now and again :)
Indeed, he makes listeners wait the whole 5+ hours of TRISTAN & ISOLDE for the series of them in the Liebestod :)
There's also another Wagnerian turn that becomes a motivic figure in the main aria (and thus in the overture too) from RIENZI.
I'm not at my full-size computer today, so uploading musical examples will have to wait for another time...
That's very much the point (or at least mine in response to the OP); whilst it is just one of so very many expressive devices in music, has it ever really "gone away"? I've certainly used it when necessary, although I've not thought about it consciously...