windchill is for cretins viewpoint
While harsh, is fair. It’s only *felt* on exposed skin, and only down to a particular level IIRC. So you do cool quicker, to a limit, but then it’s more *perceived* by your brain. I think it’s all too do with how fast heat can transfer between materials?
Basically, if you bundle up properly, air temp is still far more important than windchill. And perhaps ‘time to frostbite on bare skin’ would be a better measure?