Personally, I made it through D:OS after a couple of false starts and stalled on my first playthrough of D:OS2 at the start of act 2 and haven�t got round to replaying (mainly because I�ve been playing BG3 early access!). In that, and in multiple other ways, my reaction to them is similar to the PoE games. That is, there�s lots to like about them, and I�m glad they exist, but they just didn�t grab me in the way that my favourite games do.
So while I�d not object to D:OS3, and would almost certainly buy and play (at least part of) it, it�s not something I�m itching for. Even if what Larian have learned about procedural cinematic animation from making BG3 is transferred to it, though for me that would certainly be a plus.
But then, I think it�s important for studios to make games they�re passionate about, so if that�s what Larian want to do and they have what they think is a good concept for it, then they should knock themselves out. Even if it�s not my particular cup of tea, hopefully the success of BG3 will have made it easier for another studio to have made an RPG that is!