Intriguing stuff here from a geek perspective, as I have an X2 and am only plagued by a lack of gears. I would expect e-shifters to have been made reliable by the time the 3 series came out, I didn't realize they were that bad, especially as I would love to see them everywhere. Having to adjust my son's bike shows how tough shifting gears can be, and the cable is constantly stretching. Plus, the whole getup freezes in winter.