Last week, after a large Windows update, my laptop popped up an offer to upgrade to Windows 11 before even getting to the sign-in screen. There was only upgrade and decline buttons and while I didn't want to update right at that moment, I didn't want to decline either. I pressed Esc and it continued. No idea if it was the same as decline, but checking Settings > Windows Update confirmed that the offer is still there.
I looked around for Windows 11 upgrade stories and couldn't find anything useful - all articles and posts described the new Windows 11 look and feel and had very little to say about features and general behavior. So, I decided to upgrade on the weekend and check it out for myself.