A lot of the storytelling is through 2D scenes giving the illusion of being animated by moving pieces around (which does the job perfectly fine), and a lot of the side quest stuff is just plopping one character without any impressive animation in one spot just dropped in the world.

In BG3, there are a bunch of minor side quests where there are several characters interacting with each other in the 3D world, and your decision making branches branch harder. Just the sheer number of otherwise "minor" interactions with fully animated, voiced, and narrated actions is crazy.