Very detailed explanation. Thanks.

This gives another layer to game replayability which is already so huge.
In Wasteland 3 I liked for example; if you make the right character choices, you can use every character and skill to explore everything in the game with your party (mostly). In one playthrough

In Baldur's Gate 3, I also like how you won't be able to do that. Your party will never be that big so you will always be missing something.
Gives another dimension and leaves plenty of space for multiple playthroughs