Not really. All three of the major manufacturers offer electronically-controlled derailleur gear systems. It offers minor aerodynamic benefits and more reliable

Not really. All three of the major manufacturers offer electronically-controlled derailleur gear systems. It offers minor aerodynamic benefits and more reliable shifting performance with no real weight penalty. The battery adds about 60 grams and the derailleurs are slightly heavier, but the shift levers and cables are significantly lighter. That battery lasts for about 1000 miles of typical riding, which is more than enough for the target market of racing cyclists. The inconvenience and cost of electronic shifting isn't a good fit for leisure and utility cycling, but it makes sense in racing where every marginal gain in performance is valuable.