Windows 11 - used it $day job$ and it's ok. That's as charitable as I can be. They're looking to move staff to Macs and Linux, and retire W11. It's only in use because of things like Office, Outlook, and the odd bit of software that's Windows only. Which is kind of ironic, because there are quite a few programs I've come across that download only for Mac or Linux which is the opposite to 20 years ago.
It's funny and a bit sad that Windows 11 is the kind of version of Windows I would have associated with Ballmer. A sort of in-your-face money making machine with all its ads and cruft. Yet, it's Nadella. Does Microsoft, at some level, have a 'we know Windows is dying' attitude? They have their other billion dollar 'pillars' of Azure, Office, XBox, and so on.