nostr:npub15t7j6m70tv72xmgryk7ehvznx7eqs55y7avgel4j6k0t5fekm72q9vv9k3 There was a performance reason for HHVM, but the Zend Engine is now on-par with HHVM, from what I understand. Hack is a different programming language that interoperates with PHP, and HHVM doesn’t support modern PHP, so there’s no ecosystem benefit (e.g. Composer packages) when using Hack. I think Meta made a mistake with that decision; no one outside Meta or Slack uses HHVM now.