Years ago, while I was a student and then a junior dev, I switched distro regularly enough (5-6 times a year).
Later, bigger work comes, family, bigger responsibility comes. No time for distros. I even don't know what version of ubuntu I have ;) laptop is new enough, so I suppose it's 18.04. I even do not change wallpapers or any other configuration.
This is totally legit! When I think of how much time I have spent with fixing issues with a new distro, finding my way around and playing with Ui config stuff, you have more time to be productive without dealing with all these things :)
I think the only real good thing, that you need to spend time to configure - is shortcuts.
And usually, once you got it - just save it and reuse later
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