> JD doesn't spend a dime to deliver the upgrade

That's true, they already spent all the dimes installing the top-of-the line engine in the tractor.

> JD is crippling the capabilities.

Said another way: Deere gives a discount to those who don't need the full capabilities of the engine provided. Another user pointed out that market price is $1000 per horsepower. That's a significant savings when you don't need the extra 1-300hp.

The idea of buying 'Horsepower' instead of an engine is pretty weird though.