Yes, plenty.
But you are making my point here. The horse has a brain and coupled with training and experience, it understands the problems faster than I'll bet a computer could. The horses brain, and the muscle memory, coupled with thousands of years of evolution and way it all comes together with those hooves coming down on uneven ground, is absolutely a thing of nature's brilliance. Add an experienced rider to that, and now we are talking about many millions of instant computations.
A transmission is just gears. I prefer standard transmissions, and an automatic for certain vehicles is dumbed down. But a vehicle transmission is not a good comparison to a horse. Most cars are automatic transmissions today as a result of generations now of people who were never forced to drive a manual transmission. I know 30-40 year old men today who cannot drive a stick shift. Pretty sad state of affairs I would say.
Nothing compares to driving a vehicle with standard transmission on wet, muddy, or snow covered roads, and then having the feel of the engine, the throttle, the brakes, and the rubber all so well as to achieve the best possible traction and control without some computer doing that for you. Because what happens when the computer fails? How will you "pilot" that vehicle correctly unless just like learning to control that horse, or that motorcycle, or that fighter jet, you haven't mastered all the skills. And BTW, nobody ever masters anything who hasn't learned in the most adverse conditions over a period of time. All AI hopes to do is eliminate human skills sets. It will certainly help a bad driver, but it will never make a bad driver a great driver.