As far as I know BuckleScript isn't a FB project.
Re:TypeScript vs. ReasonML
by chucksmash on Wednesday September 04, 2019 @12:48PM
(#20878994)
It isn't[1]. It's a "partner project" to ReasonML which ReasonML relies on[2].
[1]: https://www.bloomberg.com/company/press/open-source-at-bloom...
Microsoft has paying customers who are devs, and FB doesn't. That explains a lot.