The survival of released wild fish in saltwater varies greatly with the specific area and species. Better to go to entirely terminal (or better yet, in-river) until the stock in question can sustain additional harvest. Then, move the fisheries out, if desired.

Never will happen as there are too many communities that depend on marine mixed-stock fisheries. Fishing selectively will help the wild fish.

But, consider what happens as wild runs increase. They become more common but if they can't take the mortality we will need huge hatchery runs to make the fishery work, with (say) 3/4 of the encounters being retainable.