https://electrek.co/2021/12/15/john-deere-buys-kreisel-elect... makes me think John Deere is very much looking into electrification.

It seems people (outside the agriculture industry) underestimate what todays tractors (and even more so harvesters, etc) can do and how much power that requires. Harvesters running 12-24 hours a day for days or weeks seem way out of reach of what the current battery technology can accomplish.

I'd bet on hydrogen engines (at least in the next 5-10 years) for larger machines.

On the other hand tractors are multipurpose tools and it highly depends on what it will be used for. If the tractor is only expected to run a few hours a day then batteries might actually work