Here in the land of SRAM we have been seeing and using eTap for a while. I have seen issues just like I would with any group once it is being used on a widespread basis. Mostly battery issues.
SRAM warranty. Those of us in shops that have to deal with them know a couple of things to be true: a; They're part of the super cocky inside culture that SRAM has developed and give snooty shops a run for their money in terms of off putting attitude b) Once they grasp that you know what you're talking about they send parts asap.
We've finally been converting those of us here in the shop to electronic. Mainly because we are working on it all the time now anyway. Leah went with eTap. I couldn't afford it even with shop discounts so I have gone Di2. Di2 is more solid, reliable and overall better thought-out built and engineered and manufactured. but.... etap is a helluva lot better and easier to set up and will become the way all of the companies go eventually.
Too bad SRAM hydraulic brakes, while improving, still leave a lot to be desired.