For context, this is the brainchild of Julien Verlaguet, one of the creators of the Hack language used at FB. Skip was meant to gradually replace Hack, but the

For context, this is the brainchild of Julien Verlaguet, one of the creators of the Hack language used at FB. Skip was meant to gradually replace Hack, but the FB codebase turned out to be too tangled to gradually convert to the reactive paradigm, and a big rewrite was not possible, so FB pulled the plug, then Julien kept on pushing the project independently.