I know what I'm doing this weekend then
Having dabbled in Linux of various flavours over the years, but stuck with Win XP then 7 as default out of comfort/inertia/ease of integration with work (which is not in the IT field, I'm just an interested amateur), I've now had it with MS after weeks of trying to keep this "upgrade" at bay.
There's a couple of old programmes I use and like which may not run well in Linux, so I'll need to figure out running Windows Fundamentals for Legacy PCs in a VM, but otherwise I know MS offers me nothing I need that I can't get for free in LinuxLand.
In the long run I'd rather spend hours of my free time learning useful skills on an OS I know I'll be hanging on to than spend hours trying to keep an OS I don't want away from my PCs. They're not to my mind particularly old machines, and do everything I want them to, but they won't benefit at all from any of the features Win10 offers on the hardware front, and if I have to have the hassle of learning new ways to do stuff on the software front I'd rather do it with a setup that will make my PC run faster rather than slower.