John we`ll just agree to disagree... its just a matter of opinions anyway.
If it's PTO RPM all the time, why does a manufacturer both to install a throttle??
I think your on the wrong forum. You keep talking about trucks and this is a tractor forum. Not in the same ballpark. Not ran or operated the same, as you tell us. Us tractor operators run our tractors full throttle or very near full throttle as soon as they warm up till we turn them off some times hours later. You say you have no experience with tractors with regen that are run like the factory says to run them, full out, yet you keep knocking tractors with regen systems????? What about motorcycles and go carts? Any advise on them?
I've bought over 20 new Kubotas from Steve Barlow. He knows more about tractors and Kubotas than I'll ever know. I'd ask him which one he would buy and that's the one I'd buy.
I could probably live with TIER IV but not the selective "duck-duck-duck---goose" web of laws of this stuff.
You want a fleet of jets to fly off to a global warming conference in Sweden and belch a black smoke and soot trail back to this country while using 50,000 gallons of fuel? No problem.
Want a small diesel tractor to put a few hours a year on and consume 30 gallons of fuel? Problem.