I have PS5 now, so I'm tempted to pick up BG3 for PS5 as well, but I'm afraid that a: i'll get used to the smoother/nicer graphics (I have an older PC), and b: no mods on PS5
As for other fears? hmm, that the story will be a series of themepark rides instead of a gradually building strong narrative with a group of people that feels like a party. I WANT to like my companions and the story, so having those organic moments to get closer to them would be nice.
edit: Oh, one more fear, that combat is more important than the story.