With a follow up to a previous post of his about Delphi's choice of VCL over Prado for the behind the scenes framework for their software, Eirik Hoem has posted this based on feedback from the original post.

What I miss in the feedback I got from my previous post was people acually using VCL/PHP for enterprise applications and how that is working. From what I can tell the usage of Exceptions is still limited to the 3rd party libs such as Zend Framework which are included with VCL/PHP. That's a bit interesting.

He mentions one big issue that several people pointed out with the VLC implementation - the class name prefixing (or lack there of) and the problems it could cause in the future. Prado uses naming conventions that keep its classes out of the move generally named realm. He also touches on the quality of the code behind the VLC implementation, noting that while it might work well for smaller projects, there's more of a potential for failure on enterprise-level usage.