I interview a lot of php-devs, and a very large proportion of PHP shops are still on 5.4 or earlier (which is all EOL). Very often they are not at all aware of the new features in 5.5 and later.<p>CodeIgniter is still popular and  a lot of developers have no clue about namespaces and composer usage. It will really take a _long while_ before php7 becomes commonplace.