BG1&2 were singleplayer, story driven RPGs build using DnD engine. Larian’s games are multiplayer, system driven, sandbox RPGs. None of those are not bad by definition, but they are different and they appeal to different audience.
BG1 and 2 had multiplayer and they were somewhat non-linear, not entirely story driven but not quite sandbox either. I don't know what you mean by system driven?
The only difference between the originals and BG3 (based on the small amount of info we have) is that BG3 will be entirely turn based, which doesn't exactly make it a completely different genre from the old ones, but is admittedly a big difference.
