Perhaps generators or heavy construction equipment would benefit from something like this. Lower pollution, lower costs for the operator, while still offering some flexibility that electric tech may not even in a decade.

There are still hundreds of thousands to millions of work horses around the world. I'm still very much for improving old tech where it's possible and makes sense, even if it's niche.

It's not just the tech, it's the lack of infrastructure, especially rural infrastructure. It'll be more than 10 years.