Windows 11's 4 GB minimum is dishonest. You cannot reasonably run it on that little, it is far too bloated at this point. Even LTSC benefits from 6 GB, and that is substantially cut-down compared to retail/enterprise.

I'd say Windows 11's real minimal is 8 GB in 2026, with the recommended being 16 GB.

PS - And even at 8 GB, it hits 100% usage and pages under moderate load or e.g. Windows Update running in the background.