It doesn't seem surprising to me that smaller companies are cautious when adopting tech solely supported by a large company like Facebook. Plenty of projects in

It doesn't seem surprising to me that smaller companies are cautious when adopting tech solely supported by a large company like Facebook. Plenty of projects in the open-source graveyard were created and (somewhat) supported by the likes of Google, Facebook, and Twitter...only to change technology stacks a few years later and abandon maintenance of their libraries. Having to rewrite your code using different libraries is pretty bad, but it's way worse to have to rewrite your whole app because the platform you wrote it on isn't supported anymore. Don't get me wrong, I love all these technologies and (although we're beating a dead horse here with the Java references!) Hack really feels like the "Scala of PHP" in the sense that it provides a lot of great features, but you can always "drop down" to PHP whenever it's necessary. That said, I think it could use some more adoption and articles like this are the first step toward getting people interested.