What Exactly is Elixir OTP?
Elixir - language built on top of Erlang VM (currently - BEAM)
OTP - Open Telecomunication Platform - set of modules and applications for building telecommunication systems in Erlang. Think of it as a STL equivalent for Erlang.
There is no “Elixir OTP”.
Both are totally separate.
Elixir is a programming language.
OTP is an application framework to build applications for the BEAM-VM, it is part of the erlang standard library.
Elixir provides some wrappers/reimplementations of erlangs OTP building blocks, as
GenServer or extensions like