Not as good as the article seems to indicate
This isn't a generic "fold any protein" system. The competition has several divisions, and this is only one of them - "Regular targets". No multimeric targets, refinement targets, or contact predictions. And it has an 87% accuracy rate, not 100%, for predicting the structures that were ALREADY determined by humans - hardly "solving" this problem.
It's a great start, but there's still a long way to go.
https://blogs.sciencemag.org/pipeline/archives/2020/11/30/protein-folding-2020