Yeah, I played D:OS2 and they did indeed lock you in. I only played with one companion, didn't like the rest of them much anyway so I didn't really care. I wouldn't be thrilled about it here but I could deal with it to be honest.

You do raise some good points though and I think many will be upset if they did that in this game, and if Minsc is an option he'd pretty much be a character I'd never be able to leave behind either haha! I guess if Larian really wants to, it is possible they could die in such a way they can't be brought back with resurrection, or maybe even be converted to the enemy as rivals. Rivals could be kind of interesting at least though?