You're right to point this out, but it's still more annoying because you now have to remember that consciously, rather then seeing and feeling that you can just move your mouse to the edge.

Well, I don't particularly like it myself so I don't use it, it takes literally four clicks to disable panel floating.

I didn't know that but now I did it.

That's even worse then, because there's a conflict between what's displayed and how you interact with it.