Billions would need to be invested to replace and expand fossil fuel infrastructure too. More billions would be needed for hydrogen. It's just a matter of who

Billions would need to be invested to replace and expand fossil fuel infrastructure too. More billions would be needed for hydrogen. It's just a matter of who gets the government subsidies/favorable tax treatment, cynically. When batteries get cheap enough and PV arrays have been sufficiently tropicalized, there will be some switching in the rest of the world. It'd happen faster without fossil fuel interests being able to get the subsidies, though.