Originally Posted by
zatopek
My little brain seems to be able to comprehend the mechanical aspects of bikes such that I can build my own bikes and execute any needed repairs. I'd like to keep it that way. My objection to electronic is philosophical.
you can still build your own bike with di2, it's probably even more simple. Can you imagine not having to ever replace shift cables? How crazy of an idea is that.
If the choice was between Ultegra Di2 and Dura Ace 9000, I'd pick mechanical.
That's a hard choice, but why?