If you don't want to break any sense of immersion without a real full cost day and night cycle make it like it was done 20 years ago.
1) 1 atmosphere during the day with NPC doing their NPC's stuff. 2) night has come. Beautifull cinematic to make the transition. 3) 1 atmosphere at night with NPC's doing their.NPC's things at night. You don't need a bed for everyone. Some activities in the night doesn't require a bed. Life does not stop at night in the Realms. 4) day has come. Beautifull cinematic to make the transition.
Making such a game without a day and night cycle is a shame. Really.
So much money allowed to cinematics models, voices and so on... But it does not have such a basic feature.
A day and night cycle makes a world feels alive and realistic. Time management is not something you can cut off to make an immersive world.
On top of that, it's an amazing opportunity to increase the variety in the gameplay.
