There is not a big population of draft horses in my area, but most of them have their tails intact.
One thing to keep in mind, yes, times are changing. Tails can be braided, doubled back and wrapped. There is no sound reason, IMO, for tails to be docked these days. Just because it is 'breed standard' or fashion, doesn't make it a good fashion.
A horse's tail has a purpose, and that is to be able to swish away biting insects. Think of the discomfort of not having the ability to shoo the flies, all for the sake of looking good for a show.
Time for that way of thinking to be left behind.
Ditto for docking a dog's tail and ears.