Originally Posted by
FlashBazbo
Yeah, it seems to me that the biggest value is with the auto-trim on the front . . . and the biggest detriment is with the one-gear-at-a-time on the rear. A hybrid system would seem to make a lot of sense.
Both Shimano and SRAM only allow one gear at a time rear up-shifting. The only real reason you need multiple shifts per throw is because the throws are so long to get to a bigger cog. Eliminate the super long throw for down shifting and I bet that suddenly you don't miss that feature.
It seems that the buttons on Di2 can be clicked so fast that multiple throwing on DA-7900 would be slower than just double (or triple, which apparently 7900 can't do) clicking the Di2 levers.