We're just biding our time until 2050, at which point we will unlock the ability to build industrial scale fusion energy plants.
More on recent fusion developments: https://astralcodexten.substack.com/p/your-book-review-the-f...
I am no scientist, so it is hard for me to know if team optimistic or team pessimistic is right. But even if it is the latter, I think we should put more money and research on it!
FYI she's largely been debunked as a fear monger. She swings the pendulum too far in the other direction when reality is somewhere in between.
Unless maybe if somebody figures out aneutronic fusion but we are nowhere close yet.