The point is that to get further security updates, you have to spend money to run the new major version of Windows. You can run the most up-to-date Linux for free on a computer from 1989.
I tend to play around with old machines (late 80s, early 90s mostly) and getting any kind of modern-ish distro working on old machines, even distros really cut down, can be quite challenging.
As a response to the kernel's various SNAFUs, I've gone ahead and refunded to myself all of the money I've spent on Linux kernels over the past several decades -- and updated my install to the new version for free.