What they didn’t mention is that Baldur’s Gate is a Dungeons and Dragons franchise. DnD is magnitudes more popular than it was when BG2 released, to the point of being at worst nearly mainstream. What has sold people on BG3 is being able to play their tabletop game in video game form.
I do think Larian’s pedigree and the Baldur’s Gate name were contributors to its success, but if there was one driving factor it’s the brand recognition of DnD with the marketing of an AA to AAA game.
But who will they find to play Norman Reedus?!