Off-topic: https://engineering.fb.com/2022/07/27/developer-tools/programming-languages-endorsed-for-server-side-use-at-meta/

As I understand it, they have arrived at a rather arbitrary list, based on internal preferences, which they fail to fully explain. Why would this be relevant for anyone outside of their organization?

No mention of kotlin UnU (I would have thought Facebook would have adopted at least for Android if not multiplatform mobile)