Multiple characters combined with real-time-with-pause would not be as appealing today, it leads to you pausing so much that it might as well be turn-based, which is not a problem in a game where you play as only one character (e.g. divine divinity).
This.
I just replayed the BG series co-op with a friend and my god is obnoxious. Two people managing 6 characters, 3 of whom have spells to cast, is hell. For every second of combat, there are 3 seconds of pausing.
There is another mega thread to advocate for RTwP or TB (I don't mind either in a single-player experience), but when playing a co-op game, nothing is better than the turn-based mode. I think games like Divinity: Original Sin 2 and Wastelands 3 proved it more than enough.
