Microsoft admits 8GB RAM is fine for Windows 11, after years of pushing 16GB as the baseline
(www.windowslatest.com)
I have 16GB in my laptop, and it took 4 full desktop VMS running at once to finally make it struggle with opensuse KDE as the host.
My work computer sits at 8GB used with basic office things running and a tab or two open on a browser. I guess if you only have one browser tab open at a time you could do 8GB on 11.