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Well, no matter the shifter used , it requires an electrical activation to work,
Air has 2 issues , 1 electric, and air issues .
The electric has the same , but connected to same issues , electric current
Batteries get low , inconsistent it becomes,
All in what you trust, what one prefers

an electric shifter uses very little power, it only shifts twice for a split second and has 0 effect on being consistent. if you are racing these days without an alternator