Spur stop isn’t even a new thing, been around at least 15 years or more.
I first ran into it at a clinic, where the clinician wanted us all to use CONSTANT, FIRM pressure with legs, spurs, to keep a horse going in the ring. Not how I wanted to ride, too much work on an all-day trail ride! But he was teaching this kind of thinking to everyone else, who all were WP riders at the higher levels of QH showing. The more you used leg, pushed with spurs, the slower horse was to go.
Since I was really only there to put a better handle on my horse, and I explained this to him, we continued to work well together at the Clinic. I wasn’t riding a QH or even Western horse, but this guy taught some EXCELLENT methods of communicating with the bit, lightening up the front end with self-carriage of the horse, exercises for good flexibility, light to the leg on turning, so I LIKED attending his clinics.
After hearing about how to do the spur stop, I saw the idea jump in popularity for those wanting to go slowwww in the show ring. Never something I would want on a horse, if I push they better GO. Seen folks get in trouble with it, because your AUTOMATIC response to horse refusal, fright, is to tighten the legs, spur touch, to get FORWARD. Didn’t work THAT day for them, horse bucked them off. Can’t punish horse for stopping dead, when you have trained him to do that!!
I figure it is just part of all the other artificial things folks do to “shine” in the ring. Totally backwards for any practical use, only NEED to have it work for that few minutes in the ring. Spur stop would fall out of favor fast, if the WP Judges ever started placing horses that actually move again. But that isn’t going to happen, so spur stops will continue to be popular as a needed “button” on Western Pleasure type horses that show.