I will quote and reply to you

"Linux has gotten very easy to install. In fact, on older hardware, it is easier to install linux then it is to upgrade to Windows 10. (my poor friends :-("

That is true because there are even linux distros that you can even install on 486 machines to use as routers or whatever you want and they will fly!!!

What version of Windows or Mac OS does this?

P.S: Do not throw away 386 or 486 machines install Linux on them and use them as you wish!!!