Did I voice my support in this thread anywhere yet? If not, then this is it. I agree with everything said about a proper day/night cycle.
If it's too complex for Larian to do in terms of cost vs. benefit as part of a normal game, how about making it the central theme of the next one? Call it "Baldur's Gate 4: The Rise of Shar and Selûne." or even just "Baldur's Gate 4: Day and Night". Go all out! Pour your hearts into a proper night atmosphere from all angles!
Surfaces were Original Sin's big feature. Cinematics are the big feature of Baldur's Gate 3. The time has come! Embrace the Light and Darkness!
