Okay, so I can't completely tell you due to NDA restrictions but when you develop....

1. a module in Drupal...
2. that uses Dojo and IMCE..
3. to make cross platform updates....
4. to a MySQL/JSON database....
5. through a Zend Framework driven API...
6. in order to provide JSON data....
7. to a Dojo/Jquery driven web application....
8. that serves at the basis for a Unity powered 3d Multimedia Presentation...

Then you definately feel like all those years you spent learning all sorts of code environments has paid off. When the cloak is lifted on this project I'll provide more depth as to what exactly is going on, but other than bragging about how great I am, this project proves that web applications don't require a single development environment to be effective. It also proves that neither Drupal nor Zend Framework need to operate in a vacuum -- they (and Dojo) play quite well with remote data and systems developed using foreign codebases.

The strength of Drupal is that it is a modular shell built for RAD and portable modules: this project requires a portable module, soon to be shipped to the client, and so far, Drupal fills that role quite well. Its file access libraries augmented by the IMCE plugin (a file/image management system with auto-thumbnailing) played quite well with this project as did its automagic forms.

Dojo is of course a frontend library and its many options in the Ajax world saves a bunch of time; especially, its grid system, which combined with JSONP lets me quickly develop lists of content from my remote (cross domain, acutally) data source.

Zend has a lot of ORM and JSON friendly code systems -- while I am building on, not creating from scratch, the Zend Framework system, that serves/CRUDs the data in question, it does prove the value of an enterprise class environment that it is quite easy for me to pick up where the last team left off.

As for Unity, well, that is someone else's problem; it is a powerful system I'm not qualified to discuss yet, but I am getting there. Unfortunately there is no free way to test Unity; however it is well worth the $200 to sniff out its awesome feature set.