Not really. Elixir is maintained by a team and I am the only member of the Elixir team at Plataformatec. So even if I would no longer be supported (which is not the case as I will continue contributing in the same capacity), Elixir would still be in good hands. 
Plus, the whole community and all other companies supporting Elixir did not change - and we wouldn’t get where we are today without them. Brex, Dockyard, and Erlang Solutions are three from the top of my head but there are many more. Also, don’t forget about Erlang Ecosystem Foundation, which supports all communities built on top of Erlang, including Elixir.
