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Because the gains are probably quite minimal and the drawbacks include setup drama, limited brake options (and gear options if you need Di2 shifters anyway), stupid braking position.
hippy-
I should have done more googling, this Zipp bar has it too https://www.triathletesports.com/zipp-vuka-aero-bar-base-bar-brake-levers/
But no one's done drop bars as far as I can tell?
Because the gains are probably quite minimal and the drawbacks include setup drama, limited brake options, stupid braking position.
Those reasons have never stopped people before!
I'm thinking that integrating brake levers/hood area/cables into bars, removing STI levers in favour of Di2 blip/climbing things would save a fair bit. Not worth it for normal people obviously, but for a pro in the TdF or whatever who can afford to spend £1000 on a fully integrated cockpit I can imagine it.
frankenbike
Any links? Why is it not more commonplace? It must save a tiny bit over say TT levers and a fair bit over STI shifters