I can verify that compliance requirement for older versions of PHP is still going strong. Last project for a charity completed with PHP 4.4 because "we have too

I can verify that compliance requirement for older versions of PHP is still going strong. Last project for a charity completed with PHP 4.4 because "we have too much to rewrite" despite most of the platform being brand new. Also sysadmins are unlikely to support platforms in which they cannot assert their dominance.