I've noticed it seems windows aren't allowed to foreground themselves/each other anymore, which seems reasonable (anti click jacking?), but this includes VS not being able to foreground my diff tool when I diff something, and Outlook not being able to foreground itself when I double click the new mail envelope in the notification area.
I also enjoy going to grab a maximised window by its title bar and somehow grabbing the window behind it.
Yeah, windows is pretty aggressive with the focus stealing prevention (I believe GNOME on Linux is also working on something similar, hopefully with a better implementation).
It seems to struggle with differentiating between what's a user initiated focus-steal and what's automated/originating from the app without user action.
I'll take that over what existed before, which was any app could just open a window and give itself focus at any time.
I also enjoy going to grab a maximised window by its title bar and somehow grabbing the window behind it.