> US is because it's functionally illegal for it to exist.

This feels like one of those 'burying the lede' situations.

Can you explain what's functionally illegal (and I admit that I'm mildly curious about the distinction of functional illegality and non-functional illegality) about this existing?

I'm as breathless as you are, after reading that second paragraph, but I nonetheless remain ignorant about the nuances of the legality of this situation.

> Can you explain what's functionally illegal

GP explained it right here:

> the EPA mandated DEF/DPF systems + limp modes on all farm equipment since 2014

I don’t recall exactly wha the Trump admin has changed but I know there have been changes on emission requirements. The way I understood this is historically all equipment with diesel motors have had pretty strict requirements for emissions and an engine like this would simply not be possible.

My take on this is you are throwing all the good things away about modern engines. You could easily make a right to repair tractor with low tech but still enjoy modern improvements.