Elixir is still a moving target (as the number of deprecations and changes in the announcement show) so if you are building something that needs a stable base then I would not recommend Elixir just yet. You are still using a lot of Erlang libraries for things outside of the core, so you still need to learn or at least understand Erlang and its APIs. OTOH, I love it and I think that the costs that I mentioned previously are more than made up for by the lower cognitive load Elixir imposes on people coming from outside the functional world and the macros and protocols are very cool. Elixir is a language to play around with now and get used to and in three to six months I think it will be a serious contender for any new product that slings packets or has to handle massively concurrent loads.