I will bet you can afford to pay for very good help vs pay the fees for the autonomous machines & their upkeep. Plus, that high paid employee can drive a truck, a tractor, a combine, a lawn mower, pick up your wife when her car breaks down, etc etc. I've not really seen a shortage of help in this area. Yes, there is a shortage of $10/hr qualified help, but pay a little more & you have someone that can work while you sleep. I wouldn't do that with an autonomous vehicle either.

Who would send a 400 hp robo-tractor out to work ground at night while you go home & go to bed? Any capable employee can easily work at night.

Robo tractors are possible, but dumb.

Tell you what....think about having a robo-tractor hook up to a hay rack full of your loved ones & take them on an old fashioned hay ride. One would have to be seriously drunk to trust such a machine with your or anyone's loved ones. But, it doesn't take much of a mechanical engineer human being to safely drive a hay ride. It just takes someone safe with common sense. Machines cannot do that.