They exist, just let your campy brifters run out of tune for a while, all the sudden you have to use a 1/3 motion to get it at the gear, shifting back down you will overshoot and take a step and a half.

Yeah, it took me a while to get them tuned and precise.

I have to admit though, any more than 6 speeds on the DT and I need indexed. Just makes the use so carefree and less focal.