Isn't it borderline arrogance to ask this question? People are impacted and you care about your favorite tool? React will exist, and it open source, if you care, you have options do something about it.
For the lack of a better example, when Bill and Melinda (Gates) got divorced, people were worried about the Gates foundation. They even posted about it in their official note of separation to the community. Now, that makes sense. Asking about an open source project that's already quite stable, right after Meta lays off employees is in poor taste.