He's gotten pretty friendly with them over the years. When we bring friends along to their farms to pick up goods, they're always shocked how contemporary these guys are.
One of them has a pretty sophisticated machine shop, with tools like drill presses, saws, sanding belts, etc. all driven by a series of axles forming a mechanical drivetrain that snakes throughout the barn (eventually to a very old diesel motor).
A couple of the young men came out to frame a house he's building. Once on a day off, they arrived by carriage and brought a pair of young Amish ladies with them to hang out at the beach. The next day, my dad found one of the girl's leggings left behind. He was discreet enough to return it to the girl's younger brother, instead of her dad.
All the kids know how to use iPhones - they sometimes ask to borrow his so they can make a call.
One of the more technically inclined gentleman even showed up one day with a cutting-edge drone, and had a blast flying it around with my dad. He made it very clear his wife isn't allowed to know he owns it! Last I heard that same guy is helping plan a solar array my dad wants to install to go off-grid.