That said, I seem to recall Sven said that "roll for stats" will be in BG3 in an interview or in the Reddit AMA (IIRC, feel free to correct me)
From that Reddit AMA:
Swen: This is our campaign, but it's absolutely your adventure. The small amount of gameplay we've shown so far, focused on one of our origin characters, but whether you *roll* (emphasis mine) a custom or origin character, the choices you make and the actions you take carry the same weight.S
wen does not explicitly say "rolling for stats". In the above context "roll" could just as likely mean "choose". I searched for more mention of this to clarify, but only came up with people making assumptions. If anyone has more info, I'd be keen to know too. I probably spent an hour cheesing my character in the original series, and would like to do that again, more to chase the nostalgia than for the munchkin factor.