It is almost the same as Windows 8 underneath. W11 for almost everyone should feel just like a new skin with couple more features. There are some annoyances, but I have not seen anything yet that I would consider dealbreaking.
They put ads in the startmenu and take “snapshots” of your machine every few seconds to train AI to replace office workers.
At least on Pro / Enterprise / Education edition there are no ads. Maybe I have disabled them, no idea. It could be that this is a thing in Home edition that cannot be easily disabled, have never used Home edition in my life to be honest.
Recall is an optional feature that will run on specific CPUs and it will be local unless something recently changed. Would I use it even if I could? No, I don’t see a need, but it probably will be useful to many.