Dorms are a poor example. Everyone there expects it to be a
temporary community other than larger structures like fraternal organizations that slowly nibble in new members and continuously digest them as things progress.
It's not like you're in an apartment or house where you don't know if it'll be next year, 4-5 years, or 10 years when you move; only that someone's going to raise the rent, or you'll get a different job somewhere far enough away and have to endure the hardship of moving everything yet again.
