If you have a separate partition for /home (your personal data) it is pretty easy since you can reinstall the system, leave /home untouched during installation and just configure it to be used as /home in your new setup.
This does not work if you either do not have a separate /home partition or you encrypt your system via LUKS.
It technically still is possible in the aforementioned cases but involves expert knowledge and probably a lot of manual steps which I’d say for you and me it probably is impractical.
That depends on a couple of things:
If you have a separate partition for /home (your personal data) it is pretty easy since you can reinstall the system, leave /home untouched during installation and just configure it to be used as /home in your new setup.
This does not work if you either do not have a separate /home partition or you encrypt your system via LUKS.
It technically still is possible in the aforementioned cases but involves expert knowledge and probably a lot of manual steps which I’d say for you and me it probably is impractical.