Originally posted by Nefrarya:

Slight penalty to consider: You lose rested buff, same as when you log out / log in for a single world.

Thank you too for the warning! I'm on a small patch of meadows surrounded by plains without gear (landed there at night, didn't see I was surrounded because I haven't seen plains before) so I have to start over anyways.
As long as the world remains intact I have the peace of mind that I can go back at any time.