I watch elixir from a distance and don't have that much practical experience in it but this looks like it's too hard to read in order to be that useful imo.

At least I wouldn't use it mostly because of the paranthesis and I really do hope that it's going to be optional if it were to be implemented. I do write code in typed languages on a daily basis but I do think it's overrated especially here on HN. I like that Elixir is dynamically typed and I think that it's just something that's not really in fashion at the moment but it will come around, eventually.