I mean, I think people are somewhat missing the fact that it's not like these worlds are separate or competing. Some people have worked on both PHP and HHVM, an

I mean, I think people are somewhat missing the fact that it's not like these worlds are separate or competing. Some people have worked on both PHP and HHVM, and it seems like they've always acknowledged that they have different goals. From the comments in the post of the Hack announcement (before PHP7): Q: Do you imagine a future where Hack will merge back into PHP (like PHP 7), in the same style that Beryl & Compiz then rejoined? Or does the team intend for the two to always be adjacent-yet-separate? A: HHVM developer & PHP runtime developer here. I've got hands in both runtimes and all even I can say is: Maybe. I think the most likely outcome is that PHP will adopt some of HHVM's additional features, but remain a separate project. IMO that's a great outcome, since we'll both likely drive the other to be better. EDIT: Source, https://news.ycombinator.com/item?id=7436557 https://news.ycombinator.com/item?id=7436557