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Preloading File Explorer in Windows 11 Doubles RAM Usage, Offers Minimal Speed Boost
(www.techpowerup.com)
This is a most excellent place for technology news and articles.
The IoT edition of Windows 11 runs in 4GB ram and performs ok. I don't recommend more ram, I recommend either Linux or LTSC IoT.
Ya that would not be a sustainable option in my case unfortunately.