I don't disagree in principle, though I question it in practice. I suspect network interfaces disappearing from KDE on mainstream distributions is rare. That may vary if you're using "Dave's Janky Arch Fork" or some such.

Commercial operating systems aren't immune. I found several people having a similar problem with Windows 11 on Microsoft Q&A, as well as a thousand third-party sites offering instructions to fix it, likely all infested with ads for "fix your computer" programs that will make things worse: https://learn.microsoft.com/en-us/answers/questions/5583596/...

I'd expect Mac OS to be better, in part because it only has to support a few models of computer. Perhaps it is, but it's also not immune: https://superuser.com/questions/1756912/ethernet-interface-d...