> Even if we had nuclear fusion, solar+batteries could still win on cost and time to deploy!

In a world with abundant fossil fuels on which globalisation relies.

The question is: what happens when it stops? Can renewables win in a world without abundant oil? We don't know, we haven't tried.

"we"? Looking at electricitymaps, everyone except maybe Nebraska and Mongolia is making progress.

The supply chain already exists, available worldwide as long as you don't bomb your suppliers.