Are you sure? The React compiler is a fairly new addition to React, Flow is Facebook's old alternative to Typescript, but Typescript won the ecosystem in terms of broad adoption in the end. I think Flow is barely used today, I would be really surprised if they choose it for a new tool, even for a Facebook project.
You may be thinking about React itself, not the new compiler? I'm sure there must be some flow in there still from back in the day.
You may be thinking about React itself, not the new compiler? I'm sure there must be some flow in there still from back in the day.