It was featured in some article on HN before that we used to have "safe areas". Areas where you could grab a window and drag it around, without having to carefu

It was featured in some article on HN before that we used to have "safe areas". Areas where you could grab a window and drag it around, without having to carefully place the cursor or accidentally pressing a button. This is not new in Big Sur, but has been happening for some releases now. Take the Notes.app, it doesn't even have a title bar, just a tool bar. When resizing it to (what I think is) a comfortable size, the toolbar buttons are side-to-side leaving just a few pixels of margin by which you can drag the window. I'm not a fan of this trend, but it seems the way forward for all macOS apps. With this release it is brought to most first-party apps.