BCDon wrote:
I'm more worried about "circuitry failure" on my car, the planes I go on, the pacemaker in the other driver's chest etc.
I can't afford EPS but I fondled it on a bike a few weeks ago and I'd ride with it in a heartbeat.
I don't know what type of exposure you have to the reliability testing that goes into electronics for the automotive or aerospace market, but it's pretty darn solid. Automotive electronics have to last 15+ year life span in the field working from minus 40C to plus 85C ambiant air temps (park your black car on a hot day in Dubai or Vegas and that is the "cold start" temp of the electronics, and on the other end minus 40C cold start is not that uncommon in northern Canada).
This stuff is pretty solid, much more solid than Di2 electronics. Not putting down Di2, but the comparison with Automotive and Aerospace markets is not quite right. I can't speak for the pacemaker in the other guy's chest, but given that all of these systems have mission and safety critical (lives depend on their reliability), you probably need to be less worried about that than Di2 shifting.
Did you ever notice that bicycling electronics are limited to shifting where they are not even that mission critical (you can still complete the ride in the gear you are stuck in) vs. braking where they are safety critical?
To me it seems that electronic braking would be much more "aero" than hydraulic braking, but I'm not sure that the component companies feel all that comfortable about going there "yet" given that the "user error" on keeping the charge up (etc) might mean life or death.
Dev