phenry24 

Just based on what I see out on the road I'd be surprised if there was less than 3 Di2 groupsets sold per 1 mechanical in recent months/years. But most of the time I have enough opportunity to hee and haw and others' bikes is in fast group rides and races, and I'd imagine electronic shifting is going to be a little over-represented with those crowds vs. the general populace. I've been on rides where I had the only bike still moving derailleurs with cables out of two or three dozen other riders, my fingers are crossed that Shimano still does continue producing higher-tier mechanical shifters so I can continue to be that guy. I understand if they decide not to though, the market for those parts just doesn't seem to hold a candle to electronic shifters.