I’ve always wondered how much extra drag windscreen wipers create, and how a mechanism to completely stow them might save a lot of fuel. They’re like little speedbrakes sticking out into the nice laminar flow at the front of the aeroplane, and they do that for the whole sector.
Yes, it would be more mechanically complex, but you’ve already got electric motors and drivetrains. Could be as simple as having some kind of a scuttle, like you do on cars, which the wipers come up from. If it’s worth it on a car, on an aeroplane at >5x the airspeed (>25x the drag) it would seem to make even more sense...