Why is Move top-row toolbars into the window title bar on by default 13.6.4

Why is Added Preferences / Toolbars / Options / Move top-row toolbars into the window title bar option turned on by default if it only works with Windows 11 and in windows 10 every time I clicked on the title bar what ever window behind comes to the front also you cannot move Opus with the Title Bar. Using the X on the tile bar does not work as it just brings what is behind to the front.

Will be fixed in the next beta. It's meant to be off by default, but isn't for everyone, due to a quirk in how the config data is stored.