Useless article. It lists abandoned frameworks like AngularJS and Polymer, and also small fish like Aurelia and Mythril, but doesn't mention rising stars like Astro or giants like Next. Enough said.
The title is deceptive: Axios doesn't outperform fetch. It literally cannot, as it's based on the same underlying API to retrieve files.
It just has a nicer interface, and even in that case, it's only marginally.