You cam modify the windows 11 installer to install on a surface pro also
You can technically install MacOS on old, unsupported Macs too. I've never done it personally but I know people who've been running the latest software on long-unsupported hardware with no issues for years.
I'm not following — what's the cheap shit you're referring to here?
It's cool that you were able to keep your Surface for so long though. I wish more people would hang onto their tech until it actually needs replacing.