Fortnite had at some point 125 million players, but does not me make me love that game. Baldurs Gate 3 does not need to be the biggest sales out there. It has popularity through DOS2 fans and then Dungeons Dragons fans like me and other potential players.
If it gets into 125 million players, it will inevitably suck. That number of people just can't enjoy a good turn based D&D RPG.