We know darkness is there to fill this purpuse, but that's not dynamic, most people will quit before they even step a foot there,
Darkness should be more of an ambiance with creepy sound effects & shadows here and there, But with the sunlight not able to shine as strong as it would in civilized land, day night cycle might even dissapear in the farthest part from providence.
Darkness monsters might even wander outside their "zone" at night.
Daynight cycle adds a lot to the immersion. The game feels very static & It's even strange to play a survival without it.
Also the game looks much better at night with player made light sources.