> Solar is going to be a very transformative power source for developing nations. Because it can be bought in small quantities.

100% Agree

>While it's less attractive for developed nations because it's still more expensive than fission and coal.

100% wrong. This hasn't been true for a while now. Today solar and wind are often cheaper than even running a fully paid for Coal or nuclear plant.

https://cleantechnica.com/2022/07/21/most-renewables-cheaper-than-cheapest-coal-in-g20/

> Are there challenges, absolutely. But does that mean we just give up?

No, it just means we need to be realistic about the challenges and how far in the 'future' the reality of fusion energy actually is.