Earlier quoted context omitted.
Just try to imagine HHVM in year or two. Zend PHP will be irrelevant by then.
I'm not sure why you guys ganged up to downvote on something obvious - PHP is loosing grounds to HHVM already. I'm considering it for all my PHP projects already - it's easy to install and most PHP frameworks are well-supported already ( http://hhvm.com/frameworks/ ). I can imagine HHVM having integration within Nginx a la HttpLuaModule, which uses LuaJIT and would eliminate going the FastCGI route.
Perhaps because some on HN are computer scientists, so to convince them it takes actual numbers and not some anecdotal evidence of what you personally use.
Judging from all available data sources, you are an outlier.
HHVM doesn't have that large a community (mostly FB people), is not installed in the overwhelming majority of hosts, still has compatibility issues, has few posts about it, there are very few mentions of companies using it, and, for what it is, has been largerly ignored in the whole PHP community (forums, etc).