I have a bike with Campy Record and a bike with Shimano Durace. I gotta say that the Campy components are way way smoother, provide such a sweet shift and appear to operate with such little friction.
On the topic of an electric drivetrain, I say yes. I would go for it as long as there was minimal battery drain. Nowadays lithium batteries last forever and I don't see it as a big deal to replace the batteries every year. There should be an easy way of testing the remainng battery charge.
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Adrian in Vancouver