If you're trying to limit your exposure to different technologies, then I think Elixir is a great choice.
If you're going all in on cloud, microservices, and managed services, then - outside some specific problems - I'm not sure if Elixir is any better of a choice than other language. I personally like immutability+FP but that feels a bit subjective.
But I've worked at small companies for most of my career, and it's my (obviously subjective) opinion that Elixir will let you build a better system if you don't have the luxury of using the "right tool for each task".
