The classic pitch correction that people notice is that in Cher's "I believe."
Pitch and auto correction is used mostly for people who can't sing and can't hold long tones. It's been done for best part of two decades.
I've always admired people like Andrea Motis, as she can sing in tune and hold long tones. She was trained to do it as she's also a trumpet and saxophone professional.
Back in the day, we had none of that, as it wasn't needed.
Well, in some instances it was, as without, it bacame "take 2" or whatever.
Sarah Vaughan was called "Miss Perfect Pitch," because of her ability.
Sinatra used to "slide into the notes," part of his vocal appeal.
What amused me was the documentary on, Stock, Aitkin & Waterman.
Pete Waterman said Bananarama came over to his label and they recorded a couple of takes of a new song.
He told them that'll do. They queried it as they said with their last label they were recording the same song for three days. He said he didn't need to. Between the two takes he could manufacture a good performance with the technology they now had. Now how long ago was that?