dunno.

If you gave two people with no other knowledge of computer access: Kubuntu and Windows 11

I'm sure they'd have an easier time with Kubuntu, and this gap has been widening for quite some time in the favour of KDE.

The largest issues seem to be either power users doing esoteric things to their systems, or people who want to work the Windows way.

Drivers (for as much as I can tell) are mostly solved, with some minor touch buttons on some laptops being an issue in some cases.

I'm not comparing Linux of 2007 to now, I'm comparing Windows now to Linux of now- the only real edge Windows has going for it is that it's already installed when you buy your computer.