Besides being relatively new, it seems to have basic things you need.
It’s been baseline since March of 2017.
I’ve never run into a case where I’ve needed to use axios in almost a decade of being a professional web developer. It’s mostly been an annoyance whenever I’ve come into contact with it, and replacing it with fetch() calls would’ve solved those issues.
Besides that, axios is a dependency for functionality that is already built into the web platform.