But what if I want a faster horse?

This gets especially interesting when you consider that horses are still better than motorized vehicles at accessing certain terrain. For example, a horse can trivially climb a steep hill in the wilderness with no road, or ford a river with no nearby bridges, that even rugged ATVs can't really handle. The vast majority of transportation needs are better served by motorized vehicles, but horses still have some unique advantages and in some areas are unbeatable. Now that said, some of the freaky AI robots with legs might finally render horses inferior, but those are pretty inaccessible to most people.