I run XFCE for my dell latitude 3190 running Ubuntu to speed things up a little, I tried Manjaro on my raspberry pi for a minute but not long enough to have an opinion about it.
Discussion
Funny, I just flashed Manjaro ARM to my raspberry pi but waiting on an HDMI cord for the pi
XFCE does wonders on old dinosaur hardware because it’s so lightweight. Libre Office and you’re good to go out of the box.