Lukas Smith has a new post sharing what he sees as a growing trend in the development of PHP applications (a good thing) - the decoupled mindset more developers seem to follow and the use of tools like Composer that help to promote it.
As more and more projects adopt composer they will not only start using 3rd party code, they will also come to realize how easy it is for them to expose their code to 3rd parties. Obviously NIH syndrome will not be purged from the planet and maybe it should never get purged entirely anyway. But its already quite clear how much the landscape of the PHP community is changing with Symfony2, Doctrine, Zend Framework2, TYPO3 and many other projects having adopted composer.
He notes, however, that there still seem to be those clinging to "the old ways" and keeping things tightly bound to the technologies they're designed to work with. He's coming from the point of view of a Symfony2 user, so he gives the examples of some of the Bundles that are out there, reinventing functionality they could have pulled in from 3rd party libraries.