[slama]

HHVM is open source and seeing active development with weekly releases: https://hhvm.com/blog/

My understanding is they're waiting on the language stabilizing before making a push to open it up to the broader software engineering community.

They're still heavily invested in Hack and releasing research papers like https://engineering.fb.com/2021/03/03/developer-tools/hhvm-j....

Migrating to another language without an incremental adoption path likely isn't feasible for them