

US made things that are the best or in a small group of the best:
Hand tools, power tools, machine tools, alloys, plastics, clothing/footwear, hardware, firearms, whiskey, porn, movies/shows, glass/ceramics, camping/outdoor, and all sorts of luxury items.
Affordability is a different issue. There are usually options that are good enough and cheaper.
Automatic transmissions have been around since the 60’s or 50’s, IIRC.