Sustainable fisheries are largely a win/win scenario, especially where oysters are concerned.

(I don't like eating them personally, that said, but that's a taste thing.)

Suit yourself, cheaper shellfish for me then.

I'm sure farming them en-masse probably isn't great for the local ecosystem but it sounds like there's a long way to go before historical concentrations are reached let alone surpassed.

Why wouldn't it be good for the ecosystem? Oysters clean the waterways...

It's reasonable to assume oysters aren't the only organism to do this.

It's probably fine to restore the oyster reefs to their former glory. It might not be fine to populate them with 10x the natural amount.

I don't know. I'm just saying that if they go totally crazy with it there will probably be some unintended negative (depending on who you ask) consequences because ecosystems are complex.