As an R user who can't stand working in Python, where Elixir I think has the most potential is not the data science part but data engineering. The whole world of ELT/ETL pipeline and workflow tools written in Python is a mess IMO, and Broadway/Flow + Ecto + what's going on with Explorer etc I think can quickly replace a whole mess of python/scala/EMR type workflows in a language and environment that feels way better suited to the problem space, in my experience.