I completely agree that renewables are likely to beat fossil power generation in the grid by 2055, simply on price. However, one issue that I do see people sometimes overlook is that electricity is only a percentage of the US energy demand; I think its about 20%. Transport maybe reaches another 20% or a bit more. Given this, how are you going to decarbonise the remaining 60%? What I have concluded recently is that the renewable electricity quotient of the equation is actually pretty easy to decarbonise — the real issue will be heating (mainly residential) and industry, including concrete, chemicals, steel, glass, plastic etc. So I am wondering what all these people think is going to enable them to decarbonise the remaining 60% — this sixty percent mostly requiring natural gas. Residential heating is very difficult to replace with electricity as even heat pumps aren’t that effective and impose strains on the grid at the worst times (when its cold)..and there are very few other options. Which really does leave us with renewable gas as being the main focus of attention; renewable gas, biogas, biomethane, electrolysis and power-to-gas via methanation. So this is it: we cannot replace natural gas with anything else unless you can think of anything. However, the price of electrolysis is just about at the level of SMR in some parts of the world, and it will continue to plummet. Fuel cells are basically on a similar cost curve as solar — better than wind- and this, as well as electrolysers which are basically fuel cells in reverse, should prove them to be the overall winners in the equation. Anyway, there are always new developments; I hope anybody reading can follow me on twitter @reupdateinfo Hope we can get there while the economy is still afloat! Ps I don’t like the teeshirt, fairly anti-progress if you ask me.