The technicalities around the passage of time isn’t the reason Larian aren’t implementing the day/night cycle. They’ve clearly said it’s too much work making their hundreds of NPCs have activity cycles that reflect time of day and thus it won’t happen for BG3.
They actually mentioned both reasons at different moments in time (and it's not a new topic either, since it was a debate for DOS 2 as well).
Also, the problem with scheduling has already been addressed on the other "mega-thread" on this specific topic:
https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=727626&page=5The short of it: this conviction from Larian that they'll either have to go "all in" or not even bother is not shared by many.
Complex scheduling for NPCs would be welcomed, but it's in no way a basic requirement.
And the assumption that "It's better to have nothing at all than doing it in bare-boned way" is what many are already contesting.
I wouldn't want the day/night cycle to move that quickly. That would make it feel even MORE like we were wasting tons of time when we're supposed to be dealing with urgent matters. Maybe 6 or 8 hours for a full 24 in-game hours.
That's too much It basically forces the player to hardly ever experience a cycle in one single session unless skipping time. As I said 3-4 hours would be more balanced. But well, we are arguing about flavor here. It's not of genuine relevance, really.
Also, not sure what urgency you are referring to. We aren't exactly in a rush (we learn pretty quickly that the tadpole is frozen by magic) and we will probably end up spending months adventuring anyway.
