Sometimes a language and its community are so focused around flexibility and power that I don't believe the language is meant for widestream adoption. Erlang is really, really cool, but php gets websites built.
What we should be questioning is how pointless would such endeavor be.
Like kenjackson pointed out (and, oddly, this time I agree with him ;-)), your toolbox should not be restricted to PHP, however Turing-complete it may be.
But I have no intention of even dedicating one minute to such thoughts