It is both true that it not impossible that a fork of React could be succesful; and that there is a reason React "would be impacted" by layoffs. For the second

It is both true that it not impossible that a fork of React could be succesful; and that there is a reason React "would be impacted" by layoffs. For the second, the question "Why would React be impacted by layoffs if it's open source", the answer is obviously: It would be impacted if people who were getting paid to work on it have been laid off. Seems straightforward. Bigger impact depending on number and roles of such people.