Windows 11 doesn't support Intel CPUs older than 8th gens. Linux is no longer an alternative, it's a lifeline for many old yet very capable machines.
What is Microsoft trying to do by ending Windows 10 support?
What is Microsoft trying to do by ending Windows 10 support?
I've run many machines this way without issue yet, but it's not officially supported. I'm hoping Microsoft will really just make "Windows 12" or something if they ever decide to make these true hard requirements to load at all instead of just be supported.