I thought all this stuff was the same when I brought the subject up. I had no idea DEF and DPF were different things. I have three diesels and none of this EPA gadgetry, so I never had any reason to become familiar with it.
TYM tractors look really good apart from all the parts complaints.
I have learned to distrust environmental "advances." Sometimes they're wonderful, and then there are all the other times.
My house came with curly Gore bulbs full of mercury. They took about a minute to turn on fully, and they put Americans out of work. I got rid of them when LED's came along, and then I found out LED bulbs are intentionally designed to fail early. The manufacturers put false longevity claims on the packaging, and our government lets them.
I thought I had finally found a green device I liked, but no such luck. The government of Dubai made Phillips create LED bulbs that actually work, but they are not supposed to be sold in the US.
I had a green front-loading washer. My clothes smelled like mildew. I found out this type of washer stores filthy water between washes and keeps more filthy water inside the door gasket. People like to claim they've found solutions, but they're all lying or in denial. There is no solution.
I bought a Maytag that uses about a billion gallons of water per wash. It has three dials and one button. No computer. I no longer stink, and the washer should last 15 years. The more water it "wastes," the happier I am. All you guys who have green front loaders are actually wearing your own diluted filth.
I have all sorts of electronics that refuse to stay on, as if I'm not entitled to leave them on if I want. I have freezers full of flammable gas because the old refrigerants made penguins depressed or something. Flammable gas, in an appliance in a combustible dwelling with three people living in it.
My chainsaws came with EPA-mandated defects the makers did not go out of their way to mention on the packaging. I fixed that. I had to start buying special gas because the EPA likes diverting crops to ruin engines.
Paper straws. There's a beauty. They collapse. Everyone hates them. I went to Ebay and bought 600 plastic straws. The city where I used to live banned plastic "T shirt" grocery bags in favor of paper, which is inferior and actually much worse for the environment. We're banning plastics to protect sea life, in a country where no one dumps at sea.
I could go on.
I have ample reason to be suspicious of green stuff. It's not irrational. What's irrational is assuming these products will work and buying them without questioning it. I'm all for green everything, but it has to work.
Now tiny tractors have devices that deal with a miniscule amount of soot which would otherwise land on the grass and disappear without leaving their owners' property. Okay, but I want to know what I'm doing if I buy one.