The tractor greatly reduced the number of draft horses in the U.S. And relegated those left to the Amish or the hobbyist. The same could be said for the passenger car and saddle horses. As far as the actual use of horses I would say that blevins buckles on western sttirup leathers and girths with tongue buckles are almost universally used today but were rare only 50 or 60 years ago.
There's nothing like the Rockies in the springtime... Nothing like the freedom in the air... And there ain't nothing better than draggin calves to the fire and there's nothing like the smell of burning hair. -Brenn Hill