Never played solesta because it looks like a festering pile of trash. Graphics are important for the younger audiences such as myself who can no longer tolerate Vega64 graphics. I can tell you with 500% confidence I never would have bought BG3 if not the graphics.
Having good play is good and all. But 95% of players won’t see more then 50% of the game. D&D gameplay can be good even great but if it’s only good at the end- NO ONE WILL PLAY IT. BG3 is consistently good, it may be worse then solesta but being overall more approachable and easier on the eyes is more important for a successful game.
I know I am not the only one. Regardless of how much Larian may claim they do it out of love, they are trying to make MONEY. Hence their approach is better, and hence BG3 is a better game.