In terms of development, however, it is more of a shared custody by many community members and companies. For example, Elixir Core Team has 6 developers and only one of them was employed by Plataformatec (me).

So I would describe Plataformatec as an incubator. Elixir wouldn't exist without their support but even back in 2013/2014 we already had other companies investing in the language and the ecosystem. An investment which has grown over the last years. Plus, I am still directly involved in the same capacity as always, as this release shows. :)