Plus fully internal cables to clean up the front end.
It would be a very interesting experiment to mount aerodynamic sensor (like one of these - Eurobike Aero Roundup: Notio, AeroLab, AeroPod, Swiss Side and other tidbits! | DC Rainmaker) on pro riders bikes, and see what the trade-off is between reduced drag of an aero bike vs. reduced power from a lighter weight bike. To say nothing of the comfort factor.
If you are in a peloton most of a ride / race, I wonder what the real trade-off is between aerodynamics and weight.