We're already there. We have huge companies using elixir and phoenix, with phoenix powering the web platform for the majority of them. Several great case studies exist on elixir-lang.org if you're interested, ie:

Pepsi: https://elixir-lang.org/blog/2021/04/02/marketing-and-sales-...

Heroku: https://elixir-lang.org/blog/2020/09/24/paas-with-elixir-at-...

Change.org https://elixir-lang.org/blog/2020/10/27/delivering-social-ch...

And of course Bleacher Report, which has been on Phoenix since 2014, well before 1.0.

On the sponsorship side, DockYard invested in my work for the last six years where I spent the majority of the year working on oss, and I've just joined https://fly.io where I'll spend 85% of my time working on Phoenix and related libraries. So we are well covered on the corporate sponsorship side. We also have Michael Crumm on the Phoenix team who works at Cargo Sense, where they support a portion of his time working on LiveView. Of course it would be great for other large companies leveraging value out of our work to give back, but we're well established on the sponsorship side :)