I don't know... Larian used to be the text book definition of niche, but are they still a niche with millions of copies sold before the game even got released?
Dunno. But IMHO Ego Draconis is a much more "mainstream-flavoured" game, whatever the sales figures were like. It remains my personal favourite of the Larian catalogue and BG3 is probably about as far removed as one can get, but I've still had a lot of fun playing it. I'd like to see a future Divinity 3 being more like Divinity 2 (by which I specifically mean Ego Draconis,
not DOS2) which is why I'm not entirely sure what to think when I see the frequent comments asserting they're the same thing. :|