But that can already be done with existing linux tools - FurMark, StressTestGTK and HWInfo

HWInfo all the way. OCCT is good but proprietary.

Is that an issue when using Borg for backups? Doesn’t it checksum everything at each operation?

Backup server

That’s an interesting use case but why wouldn’t they just keep using WinXP for those specialized aplications? Why fix what is not broken?

I know it’s not secure, but it doesn’t really matter when it’s not connected to the internet?

ReactOS has been in alpha for so long that it lost all reasons to exist, made obsolete years ago by Wine and Proton running Windows apps incredibly well on Linux.

Also it’s a project supported by the russian government so maybe that’s for the best.