[Cthulhu_]

It's always cancer treatments and battery technology that gets pushed to the top of tech news sites for some reason but it never results in a "this problem is now fixed". Battery tech is incremental at best and nowadays may suffer from its own scale, that is, billions invested into battery factories set up to churn out batteries using a certain technique, which disincentivises new techniques.

But with batteries I like to think there's still plenty of investor money and healthy competition, so a large scale solid state battery plant may yet come to be.