Will BG3 implement attunement, which solasta does?
Fat chance.
Larian never said a single word about attunement and item identification and for the past two years most of us here have been busy arguing for the sake of salvaging far more broken basic systems to start making noise about that, too.
You know what they say... At some point "You have to pick your battle".
I also suspect that Swen consider the unrestricted piling up of unlimited magic items the pinnacle of game design, even looking at what they did with DOS 2.
I'd be all in favor of adding it, for the record.