The worlds most popular tractor brand (Mahindra) doesn't even crack the top 5 in the US.
If American farmers wan't the most repairable tractor, they should just buy the one that is used in poorer, less-connected regions of the world. Those are built for durability and repairability.
Mahindra's line up tops out at 71 horsepower. Americans use 400-800 horsepower row croppers towing 36 row planters.