Looks like Ducati will lose its aero advantage in 2021 to the new Kawasaki ZX-1000RR. While it does not have winglets the front end is very sleek. As if Rea really needs an advantage.
https://www.visordown.com/news/racing/worldsbk/check-out-2021-kawasaki-zx-10r-ninja-worldsbk-contender