The host is Archlinux with virt-manager. Desktop environments are Fedora spins. Virtual machines are given 5.7 GB. If you want any other test to be run let me know!
I wish there was a better way to judge the lightness of full desktop environements than just ram consumption, because speed and smoothness can vary greatly regardless of ram, so we know whether of not it runs well on shitty laptop, lxqt being no faster than xfce in my experience is pretty telling of that