If you've got another 40 years I expect you'll be surprised by what we accomplish in that time. Technology is advancing multiplicatively. We're getting more and more advanced at a faster and faster rate.
Nope...
Overly engineered crap is just that...crap that promises a lot but delivers nothing.
For any machine to be reliable it has to be simple. Otherwise it's the death by a thousand cuts routine. Especially in extreme conditions...and farming is all about extreme conditions.
Mud is an extreme environment. And farmers work in mud covered in snow every year.
Then there's the heat and dust.
Then there's the chemicals.
This isn't a clean room environment where you test things...and show with some fancy Gizmo how much torque the invention has.
Farming is not done with a room full of scientists watching a Gizmo perform and making adjustments in the fly for some sort of overly engineered piece of crap.
It's one guy thousands of feet and likely miles away from everyone (including too far away from cell towers for a signal) working on growing groceries. He has a looooong day to work all by himself. And dependable equipment is a must if he is going to get enough pennies together to form a paycheck at the end of the year.
This "One day it's going to work" ain't today.
This "We are quickly getting better" is a declaration of hope for you...not to a farmer. To a farmer it says "Don't bother with even looking at this crap for at least another 40 years"
EVs require a substantial capital investment in infrastructure. Even if it doesn't burn diesel it still requires a dedicated charging bank for the racks of heavy batteries. That's even more capital investment in another building or an addition to an existing one. The concrete pad alone is going to be a couple thousand dollars. NM the steel building to cover it and keep it all out of the rain. Then there's the whole "Lithium Batteries start fires" junk to work around.
"Oops! Sorry" doesn't cut it when dealing with people's lives. And an EV Tractor risks just that.