That is impressive but that is just insanity. I visited an Amish parish in central Ohio. It wasn't just visiting the gift shop. It was a long story but we ended up sharing a meal and spending the day with them. They are great and warm people. Very good food. Women are reserved and never really talked to us much. The place was fascinating in how clean and pristine it was. Now going back to technology -- yeah they are crazy. I don't have any other way to put it.
See I don't mind artificial handicaps. Like say, ok, let's see if I can program a web server in assembler for fun, or use an editor without syntax highlighting with the delete button disables, or spend the weekend without making any left turns. Those can be fun learning experience or just fun things, goofing around.
But, structuring the a whole life around arbitrary restrictions (can use pneumatic tools but not electrical, can use a car but have to paint it black, can't own a car but oh, you can hire a taxi, can own a tractor but has to have metal wheels, can't use electricity for light but can use it for power tools in the shop) I see it more about abuse and control of minds than anything.
This is especially interesting to see if you look at other countries. Countries where there is pervasive poverty . They would love to get their hands on new tractors, electricity, cell phones, better education and I wonder what would they think about these groups of people in a developed country going out of their way to avoid all those things.