For me (and I've been writing Elixir for probably a decade now...) Joe Armstrong's post here encapsulates it pretty well: https://joearms.github.io/published/2013-11-21-My-favorite-e...

And for me, what it comes down to, is, doing powerful things in Erlang/Elixir is trivial where it would be really convoluted in other languages. When applied to the right problem, it genuinely makes a whole class of problems evaporate, and that's addicting.