Instead of using an insecure and out-of-date OS, if you cannot move to Linux then at least use the LTSC version of Windows. It updates more slowly and is supported for much longer. Can also activate it the same way you activate the normal versions.

yea the IoT version will still be supported until at least 2032, and they will probably keep extending it with ESU at some point too

100%. There might be a slight uptick in Linux use, but the vast majority of people will either just keep using Windows 10, or buy a newer computer.