The same thing that happened when electricity and taxi drivers and airplanes and self driving tractors and 3D printed houses etc came out?

Nothing

Amish people support each other as a community and will probably be the least effected group of all by the singularity. It's even a trope in sci-fi where super advanced civilizations with FTL travel and replicators that can print out anything, will often regress back to rural farmers again just for fun