I think you’ll find that the Amish with modern milling equipment (or refrigerators for cheese they sell) also have gasoline or diesel generators. There are two principles at the heart of the Amish limitations on contact with modernity: avoiding “fancy” which they regard as violating the Holy Apostle Paul’s injunction against being conformed to this world, and an absolute prohibition on the use of credit. Purely utilitarian modern devices are generally allowed, provided they can be used without using any good or service not paid for in advance or at the time of purchase — utilities billed after use are forbidden not on the basis of being “fancy”, but on the basis that they are bought on credit.
So they're not on the grid.
Who among the Amish decides (or gets to decide) - with absolute accuracy and no chance of human error - what is or isn’t “fancy”?
Does what constitute “fancy” change over time?
If what constitutes “fancy” has changed over time among the Amish, then what can be said about their supposed adherence to absolute standards that they won’t deviate from?