I felt like I should add something to defense side, so I did a quick install of Linux Mint limited to 4GB of RAM, with no swap.
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I didn’t know what to run, so here’s LibreOffice Impress, SuperTuxKart, and Firefox with this Lemmy post open, streaming internet radio, playing 1080p YouTube video, and an additional tab with forum post about forcing software rendering as SuperTuxKart was horribly broken inside the VM.

Fits into the 4GB.

Additionally, just for fun, you can see the RAM usage on my host, also nearing full usage. You may also see a pretty solid benchmark of the VM disk in the screenshot. This is because I installed the VM into tmpfs on the host.

Seems pretty damn usable, even for some multi-tasking.