> - a lot of farms are away from electricity sources to charge
It's actually quite common for farms to have 3 phase power at the least. Modern farming is heavily industrialized. There's all sorts of dryers or blowers or other processing equipment to be run depending on the crop or livestock. Renewables, either self owned or leased land access are a big growth thing too. This means you can be in the boonies of western Kansas and yet be proximate to truly staggering amounts of intermittent generation.
> and sometimes internet connection is non-existent.
It's not great service, but sat internet is pervasive (and yes before the mob shows up starlink is likely to vastly improve this). The main thing this needs is connectivity between the unit and farmer, which is just local wireless.
> It is risky to leave a 50k machine on its own to do its job.
The price isn't a factor in any way I can think of. Any farm bigger than trivial will have several 100 thousand dollars if not millions worth of machinery parked out in the open, and tractor automation has been a big deal for a while now including examples of self driving for simple tasks.
> And what to do if battery runs out on the field?
Probably use the farm truck to haul the portable generator up to it to charge enough to get er back to the barn. Or call the neighbor and ask for a tow. Traditional tractors get stuck all the time. On the scale of problems farmers solve routinely this is very easy.
I think it's probably easy for the audience here to misunderstand what modern farming is like due to unfamiliarity. Farming is high tech now, and farmers are amazing problem solvers. But even historically that was true. Your idealized turn of the century farmer in the US knew how to operate and fix steam engines, pumps, do basic metalwork among many other things. Modern farmers are often skilled builders and fabricators as well.