Excellent background from @doctorow.
https://doctorow.medium.com/john-deeres-repair-fake-out-79da4978f4c1
"#Deere abuses copyright law to force farmers to pay for official repairs — even when the farmer does the repair. That’s possible thanks to a practice called VIN locking, in which engine parts come with #DRM that prevents the tractor from recognizing them until they pay hundreds of dollars for a John Deere technician to come to their farm and type an unlock code into the tractor’s console."
Plus: The win is not as good as it looks.