How does rebasing work? If Universal Blue were to shutdown and Bazzite/Bluefin/Aurora were to suddenly stop development and updates, could I rebase to any other atomic distro without losing my files/apps and continue to get updates there? Using the same DE (since I heard there are some issues, fixable, but annoying)
Or is it just a way to swap to a new distro while still being able to swap back to a backup of your old one if you need to?

(It doesn't matter if them shutting down is illogical, being able to move provides a sense of security.)