The vast majority of people I know who shoot game and clays use O/U, from silver pigs to high grade FN Brownings. I keep hearing something a lot from them. It'll be a story about the old guy on the shoot who shoots an old SXS. It may be hammer or hammerless, 20,16 or 12 but the same thing crops up in the conversation every time.
"Bloody hell he shoots well with it" or "I don't know how he drops those birds with that old thing"
I never tire of hearing those tales smile

Rust never sleeps !