OP and Mux co-founder here so have all the context on this. A lot has changed. Mux stepped in to help maintain React Player a few years ago. It wasn't getting frequent updates and Mux has a vested interest in the whole OSS player ecosystem (even if we didn't built it) because Mux Video (hosting) is player agnostic, and we get support requests for all of them. @luwes from Mux did the work to get to the new version, while making it possible to use Media Chrome media elements with React Player and consolidating some development efforts. We're still a tiny player team so that was important.

There are no immediate plans to deprecate React Player and I think it holds a special place in the ecosystem, but there will be overlap with video.js v10 and if there's specific features you care about or feel are missing, or if you think we're doing a bad job, please voice it here.

It was a similar story with Vidstack and Plyr, with Mux first sponsoring the projects. That's how I met Rahim and Sam, and how we got talking about a shared vision for the future of players.