I had this discussion recently as I've started to use fetch instead of Axios. The general responses were about browser support as Axios is compiled with Babel and will, therefore, work on more browsers then fetch will.
Also, Axios can give you progress updates on post requests and apparently has better security (I'm personally not sure on that one).
Yup. If you need to support IE or really old Android/iOS Axios is a good answer, though there are polyfills just for fetch if you want to go that way.
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