I hear ya! Pretty well all the Amish are horse/buggy/non-worldly as far as possessions, etc, even to the point of extremely-limited contact with outsiders, even for commerce.

That being said, I've seen a few Amish breaking clothes colour barriers, with very vivid blues (even men!), and purples.

Mennonites' lifestyles vary hugely. I can rhyme off a few dozen multi-millionaires I've known, pilots, dentists, international business owners, etc.

On the other hand, there may be a single phone (cell phone nowadays) for a single farming community of the 'old order' kind. For the most part, all 'orders' of Mennonites conduct commerce, often dividing hitech business activities (dairy, modern milling) with no-tech personal/home lives, on the same property.

tl;dr - I have a Mennonite fetish.