Electronic shifting on bicycles is a solution looking for a problem, and in the meantime creating a few other problems. I've never had an issue with bowden-cable-driven derailleurs, indexed or not, that 1.2 seconds of fine adjustment of the cable stop threaded collar couldn't fix, without getting off the bike or even coming to a stop. And that's assuming the derailleur was out of adjustment in the first place, and that simply doesn't happen to me.
But dead batteries are the bane of my existence.
Rick "thinking this is driven solely by commercial BS" Denney