I think much if this relates to CW where so clearly there are good and less good seats, someone (me) that spent years economy doesn’t think there are bad CW seats. CS makes so much of this go away. They’ll always be people that don’t like proximity to the galley or the toilets, or prefers the smaller cabin to the larger, but in the broader sense CS has made things much more equal. When I choose a seat on AA it’s almost random, and if I was moved I’d not care, whereas if I was moved from 62/64AK on the old 747 upper, that felt like a personal slight.