from what I heard, they use typescript instead of reason for some time already. I don't know if they use react or not. I also heard that they weren't always usi

from what I heard, they use typescript instead of reason for some time already. I don't know if they use react or not. I also heard that they weren't always using reasonreact even when they were using reason. So they've never been 100% on the same stack than what was advertised by the reason team. It probably explain why fb dedicates so little resources to reason too.