Servers running the Harbor plugin turn sleeping into a low-friction group convenience instead of a nightly negotiation. Night can be skipped when enough players get into beds, so the world moves on without requiring everyone to stop what they are doing and run home.
That shift changes the day-to-day feel of an SMP. Building and travel keep their momentum, chat stays calmer, and players who care about resetting insomnia can do it without rounding up the whole server. You still have the normal dangers and pacing of survival, but the server is not forced onto one shared bedtime.
You notice it most when people are spread out: someone strip-mining does not have to surface just because it got dark, while a couple players at base handle the skip. It is a small rules change with a big social payoff, because it removes the most common point of night-related tension without turning survival into a different game.
