This is primarily a sanity check before installing the latest openSUSE on my parents’ computer.
To make sure that they can continue where they left off, is it a simple case of using the
-M flags to reuse the old home dir?
useradd -u previous-uid -d old-home -M user-name
There aren't any particular gotchas that I need to look out for? (have backups, etc. sorted already). I am primarily checking this will be fine (or otherwise) in relation to file permissions, as it would be reusing the same UID from a different install.
Further to Julie Pelletier’s comment, when looking for config files, the main things I see are Libre Office, kde and backup software installed with zypper, and Mozilla Firefox and Thunderbird installed directly. While this gave me more to think about, it's not my primary focus with this question.