Partitioning your drive is something that basically everyone on Linux does but what purpose does it actually serve and is there any reason why it might be better to avoid creating partitions in your d...
A separate /home can save you hours or even days in several occasions however don't try crazy things like trying to have KDE of Ubuntu share same theme/settings with KDE6.
A /var on a fast drive can create wonders too.
I'm trying out something mildly nutty by putting .steam in /home/steam, then making user-neon, and symlinking so that I can try kde without reinstalling steam games. If I succeed I might try it with other files.
First of all you can check distrobox.it which can basically run Neon inside your distribution however you better set a different virtual home for neon in that case.
I would first tar the .steam to be on the safe side but steam is different, it is some kind of Ubuntu stable itself residing in that directory. Not a big time gamer but people laughed at Ubuntu for shipping its snap because of it.
Long story short I don't think steam would have issues. I meant not to expect KDE guys to revert upgraded preferences back to KDE5 etc. You know they do such things and blame Linux/KDE etc.
I've created a specific partition for steam games so I can use games across distro without reinstalling them.
You can tell Steam to go look in your partition for your games