1: ZRAM exists

2: Win11 is not usable with 4GB

3: Trisquel 12 Ecne exists. You might need Xanmos as a propietary kernel because of hardware, but try to blacklist mei and mei_me first in some .conf file at /lib/modprobe.d. Value your privacy.

Trisquel Mate with zram-config and some small tweaks can work with 4GB of RAM even with a browser with dozens of Tabs, at least with UBlock Origin.

The fact that I couldn't tell if point number 3 was a joke or not makes me confident we've still not seen the year of the Linux desktop.