How much science and technology do the Amish use in their daily lives? They seem to thrive and prosper, and they seem quite content.
The Amish take advantage of their status as a little cultural museum surrounded by the world's most prosperous civilization. They don't have refrigerators and ranges and washer-dryers and the things that make
women's lives easier, but the men use gasoline-engined farm equipment and they're happy to ride in somebody else's car when they're going someplace beyond the range of a horse-drawn buggy. They avail themselves of modern medicine without hesitation and their absolute favorite artifact of the Industrial Revolution is the banking industry. They're very capable managers and they run several factories that sell cool stuff to "The English." There's one right here in Maryland making some strange kind of heater that they advertise on the--gasp--
internet. They've been investing their profits for more than a century and they're generally acknowledged as being an extremely wealthy people due to the selective way they exploit the system they claim to disdain, and to the way they play on our nostalgia as the cute little Hobbit-like village. It's quite possible that the per-capita wealth of the Amish community in America is greater than that of Beverly Hills, but they still make their wives wring out the clothes and cook with wood stoves.
The Amish have lived here for a century and a half and they have large families. Yet there's no signs of a population explosion in Amish country. Apparently quite a few of those children vote with their feet and assimilate.
And I don't know, but there are umpty-eleven cultures around the world that live in the same way as they've lived for generations ....and mostly without science and technology.
With a very few exceptions like the Amazon tribes we occasionally discover, they've all been exposed to civilization and it has changed them. You're not too far from the Hopi reservation, one of the tribes you're talking about who steadfastly cling to the old ways. Have you driven through there? The problem with civilization is that it's practically impossible for people who don't want it to stay away from it. Fathers want metal tools, mothers want medicine for their children, the children want iPods. In other words it's not quite true that
they don't want it.
Everyone would love to just take the parts they like from any particular technology and not have to deal with the down side. Well guess what? Civilization is a technology.
Have we relegated them to the pits of human existence?
Even I have to admit that after their encounters with civilization, the world's remaining Neolithic and Mesolithic tribes are worse off than they were before. We gave them our diseases, then we turned around and gave them our antibiotics and vaccines, so instead of every family having three children survive to adulthood they've got eight. We colonized their land, drew arbitrary lines on a map, combined fragments of tribes who had nothing in common but mutual hatred into "nations," then said we were sorry and left them to "find democracy in their own way." We treat them like Disneyland, throwing money around, taking photos, training their sons to be pickpockets and their daughters to be prostitutes.
In other words, they were never really able to "live in the same way as they've lived for generations ....and mostly without science and technology," so it's hard to answer your question about a null set.
Finally, some of the developed nations have begun to develop consciences, but it's too late for most of these people to regain their old ways.
All we can do is wonder whether they'd be happier if we'd left them alone. Considering that the people in Neolithic villages on the outskirts of civilizations have always migrated in large numbers to those cities, even when there was still a vast wilderness to fall back to, the only answer we have is that
they seem to think they'll be happier here. For most people for most of history, it was their choice.