That would make sense if he's comparing only against fossil fuels. But what was written was:
> I like to think of solar, batteries, fission, and wind as compelling ways to go mostly carbon free and lower energy costs about 2x over the next 20 years or so.
> Fusion is what reduces energy cost potentially another 10x, which really changes the game for lots of things. Exciting stuff. Kudos to this team.
If the 10x is from avoiding fossil fuels, why does fusion get that credit, but the other non-fossil sources don't?