In reply to Nico.

Absolutely, and that's also why it's in my opinion a huge mistake to rely on these companies as a dependency of WordPress core.

In the end Google and Facebook have their own objectives and they are partially battling with WordPress to get a piece of the same pie.

It's totally understandable why Facebook has made this decision. In the end it's a company, trying to protect market share and their revenue streams. Most capable managers would do the same.

Now it's up to the responsible people who chose React to act professionally, admit a mistake and decide on new ways to move things forward with putting WordPress at risk.