Why are there points of no return?
The points at which the game transition between acts seem a bit arbitrary (mainly for Act I to Act II), and I don't see a narrative or mechanical reason to lock us out of previous maps and quests. As far as I remember, previous Baldur's Gate games didn't have this kind of points of no return. Why do you think they did it? Do you like it?
Steam Strategy Fest 2023
The problem with these games (like Stellaris, which is also on offer and I would recommend with the same warning) is that the base game lacks many interesting features, which you only get if you buy all the DLCs.