I’ve only ever modified files I’ve found online, never designed anything myself in Cad and I find plenty of real uses for my 3d printer. It probably paid for itself just printing organization bins and other things for the house. Just last week I bought some cheap shelves from IKEA clearance without any hardware, printed out some feet and now I have a new monitor stand. I regularly print accessories that I would otherwise have to pay extra for (like tripod mounting plates)
Plus there are some pretty amazing projects out there that get a lot cheaper if you have access to a printer. Personally I’ve printed a pair of astronomy binoculars https://www.analogsky.co/ and a custom mechanical keyboard fitted to my hand. https://ryanis.cool/cosmos/beta
You can blame a lot of todays problems on the founding fathers, but this isn’t one of them IMO. They would have used the states names for their collective nouns.
If you’re actually advocating for change, I think Yankee is a way better term than USians. I can’t imagine people saying USians in a normal conversation, while Yankee rolls off the tounge.