I once had pasta with whole mussels mixed in. Could never be too sure my next bite wouldn't have a big chunk of shell in it. Shit was expensive for what it was too, they definitely could have paid some guy just to stand there in the kitchen and remove the shells as it goes onto the plate for what we were paying. Not a radical opinion this just reminded me of it.
People who order and eat chili mussels (with shells) at restaurants are insane and are getting ripped off. it is the least practical dish, and by weight, half of it is inedible. I think it's also a massive pain in the ass for kitchen staff to prepare.