That's how you deal with vendor lock in.

These farmers have more balls than most Apple users.

Huh? Aren't the tractors using a loophole to avoid emissions regulations?

You can do a lot of things if you don't care about the spirit of the law and your negative externalities.

Which loophole? Using a remanufacture engine?

Yes, they're engines that you wouldn't be allowed to build and put in a new tractor.

Like, the signals seem pretty clear to me. The spirit of the regulations is that these shouldn't be produced and put into operation anymore. The company is doing it anyway.