Was just thinking about Di2. Can you:
- set it so it keeps you at a specific cadence? i.e. it changes gear automatically to keep you spinning at the same speed?
- set it so it automatically changes gear to the next highest / lowest? i.e. it automatically shifts the front and rear derailleurs to get the next gear in the sequence when you choose to shift up.
If not, surely this kind of thing should be the next step?