It's not competing if it's limited to Julia. And saving a dataframe isn't on anyone's list of technical concerns anyway.
It's a big stretch to say that a tiny Julia library which does a thing we can already do well in Julia and Python and just about any other language has any impact on the language ecosystems and how they compare to each other.
It's a big stretch to say that a tiny Julia library which does a thing we can already do well in Julia and Python and just about any other language has any impact on the language ecosystems and how they compare to each other.