Why Do ML on the Erlang VM?
People will go through any number of hoops to not give, "I like the feel of the language more", as a reason for using it. Clearly, the main reason you would consider using Elixir for this is just that. There may be benefits to Elixir as a language, but there is no way they are going to overcome the ecosystem deficiencies to make it worth while in any unbiased cost benefit calculation. Just say you want to work in Elixir! It's okay to have a preference on the tools you use, even if it's for aesthetic or experiential reasons.