D&D is balanced largely around the question of resource management, namely day&night cycle.
When playing, this is handled by the DM along with the players through narration. But in a game like BG3, it becomes a little more difficult.
One issue I encountered while playing was the ever present feeling of cheating the game anytime I pressed the "rest" button. Because yes, resting in D&D is ALSO a resource to be managed.
And so, since I can rest anytime I want, reset my spells after every fight, engage every ambush with full hp with no cost whatsoever and succeed this way much more often... Well I feel like I deserve none of these successes. "Well, then, just rest less often, you absolute inane QQ machine", you'll tell me (in more gentle words I hope). Your advice would be sane. But what do I gain by not resting? And what interval is the right one? Who decides? I have no DM to turn to, and the game gives me no obligation, no limitation, nothing to aim for. I just limped away from a fight against a horde of goblins, closed the makeshift door behind me and blew off the torches best I could. Now, surely, the goblins are looking inside every room to find me. But the magic button teleports me in a magical forest, where my magic campsite awaits, with weirdly uncomfortable-looking sleeping bags. Right now, the campsite feels like it's nothing short of a level 6 "Druid Grove" spell or a level 7 "Mordenkainen Magnificent Mansion" spell. Only it's FAR better, as it's completely free and doesn't require casting time or anything.
Anyway, I'm belaboring the point. Bottom line is: it feels weird to not have days and nights. It causes me to second guess every single spellcast, leads me to feel like I don't deserve my successes and kinda breaks the spell&rest system a little bit. As it is, it's a poor way of managing resources.