They come and go in the horse world just like every other part of society. Just use the new low-heel trimming method, trash the old iron shoes, and your horses will live longer, jump higher, run faster, look prettier, and do your income taxes to boot. Nothing really new here. There's nothing wrong with letting a horse go barefoot if that suits his use level and conditions. In fact, most farriers recommend it.
Horseshoes are bad.
As a farrier, I'd like to respond to these notions and some of the others published on the Internet by proponents of the Strasser approach. The Barefoot Horse website claims that horseshoes were a result of medieval European castle siege warfare, which caused horses to be kept in filthy standing stalls with no exercise, causing the hooves to degenerate to the point that iron shoes were invented to hold them together. But relatively few horses should have been stalled up without exercise in castles. It's not like they were under siege most of the time. When they were, horses were of little use for castle defense, and they consume a great volume of stores.