Hacker News Reader

Hack has become essentially a domain-specific language for the frameworks used at Meta. They evolve together. There's no going back to PHP because there's no reason to rewrite the frameworks and give up on the flexibility afforded by being able to tweak the language to fit the framework.

It's basically the same situation as Apple has with Swift. They'd never switch from Swift to C++, no matter what features were added to the language.

Does it make sense to adopt hack outside of FB? I never even heard of it before.

I would seriously question the wisdom of anyone even considering it.

Apparently Slack uses it (https://slack.engineering/hacklang-at-slack-a-better-php/).

By now, Hack has a lot of Facebook-specific features, most of which will never make their way into PHP.

Could be mistaken by I think slack uses it