Solasta is way lower of a budget. It has sold pretty dang well for a low budget game from a startup video game company. I don't think it has a lot to do with that it is only for D&Ders.

There are many elements of that game that COULD have made it a true rival for BG3 but there are many things left unpolished because of budget. You can't say it didn't sell well because of a niche market.