As stated before I'm a techie.
I have a Tesla X. It needs constant upgrading, and I'd not go driverless using it. I'm at the wheel. I don't trust it. Maybe for a few minutes on open motorway.
It's a great drive, 0 to 60 in 4 seconds. But the leather is falling apart after 4 months, the doors have bopped my five year old on the head despite me not actively closing them. It's been back to the garage four times for repair in 3 months.
The audio system jams constantly (an annoyance only), and auto park doesn't work in a tight space (that's ok I park myself), it doesn't see car park columns. I'm sending mine back within the 6 month warranty and buying a boring Volvo.
I'll get a Tesla again, when they've ironed out the problems. It's a great car, don't get me wrong, but I feel like I am driving a beta version.
These lorries will be the same, just with 40 tons of momentum behind them.
In America on open highways maybe it will work. Here in London doesn't work. Unless you actually drive it manually, and so you may as well buy a normal car for less.
I'm well into driverless electric cars, but we aren't there yet. I'd not be happy with a 40 ton lorry using the same software.
Just my own take on it, there are three new Tesla cars on my road now. I'm betting two will be returned plus mine. It's a toy and nothing more.