Saw Stop destroys the blade, not the saw itself. Bosch's version uses air bag cartridges on each side of the blade to effectively stop it in microseconds, but preserves the blade. Replace the air bag cartridge and you're good to go again. For chippers, I would be happy with instant feed wheel reversal. But there is a case to be made for destroying a belt or drum clutch in exchange for a human life, if it were implemented properly. In rocketry and military jets, they have abort systems in place that cancel the mission and destroy the millions of dollars in equipment in order to preserve the life of the pilots/astronauts. I see that as a worthy exchange!