> I have never (never!) encountered security problems, and sudden config changes in most updates (lates major versions of KDE are exceptions) and this is not a problem at all on my desktop machine.

I guess you also never encountered a red-bellied black snake. That doesn't mean it's not a problem for the 25,000,000 people who share an island with it.

Good for you, but don't presume your use cases and requirements are the only valid ones.