Elixir is a dynamically typed, high-level programming language focused on concurrency and fault tolerance. It runs on the BEAM virtual machine, therefore it has the most solid foundation that a language can have.
I really like the Erlang foundations and the fact that, like Erlang, Elixir is not functional as a goal in itself, but as a consequence of the goal of being a fault tolerant and concurrent language.
I’m very biased for liking the language, but for me Elixir is the obvious choice for writing long lived servers. With Phoenix and LiveView module, its also the obvious choice for writing full stack web applications.
The tooling is good, but not as good as Go’s. The ecosystem still lacks a good LSP (currently there are three projects with no clear winner).