The sails make the cars look taller. This negates the effect of lowering the rear wing height. Was the aerodynamic benefit really so crucial for some teams, to insist upon its return? In contravention of the goal to make the cars look lower, wider, sleeker. Now most of the field look like breadvans again. Ah, well, at least Merc looks good. But then, maybe it benefits more the teams who expect to be driving in wake.