“Other” has always (5+ years) been an “app” on my memory overview.
Memory usage on linux is not static; usually apps and software grab what they like, then they’ll use quite more memory; When free RAM becomes sparse, they use less until the absolute needed minimum.
With f.e. 18.5GB of free RAM, the “Other” uses 2GB as you can see:
(But “Homey” uses half the amount, probably because there’s few apps on this particular system)
(Thanks for the screenshot, @Friedhofsblond, I love the massive amounts of RAM & storage 
)
