I have not seen a greenfield, or even brownfield, CakePHP or Zend project in years, outside of $BigCo environments. Calling CakePHP in particular a "market leader" seems rather wrong.
Zend is well-written and solid, but old; it hasn't been materially upgraded for PHP5.3--which is all you should be using these days, there's no good reason not to.
Symfony2 can trivially use Zend-based components. (It does, for some tasks.) I've heard it wise-assedly called "ZF3" because of its compatibility in the past.
isnt it so that its much easier to find a Zend plugins/libraries or Cakephp ready-made plugin/library than to find Symphony code snippets