In my personal opinion offsetting a few KB of extra download size with perhaps years of system resources lost to run an extra add-on makes no sense for something that has been there all along. Not to mention that removal of the 'status bar' required the addition of a new bar to hold Add-Ons, the code to overlay the link preview on the URL bar is far more complex than a single status label, etc. The status text removal made the code more complex, making it a draggable element would have been peanuts extra. Not saying it applies to every case but this one was about as simple as it can be.