Developing a CMS with proper framework is not easy.
cox in php, u get nothing like dotnet framework has, unless we are taking up other framework to build from. But a lot of things to be considered when building a cms.
from user, roles n permissions, to modules, module access permissions, theming an templating, database layer, workflow of articles, sticky, search engine, tags, sections and categories and media of publishing(html, pdf, print). And all this has to be within MVC concept...
Good thing about using drupal is that it gives a lot of control to developer, without having to hack the core of drupal.
If we don't need to hack the drupal core, then can get security fixes easily.
Drupal has their team of security hacker do tests on codes of community contributed modules for flaws. Using drupal is like having team of unlimited n growing community to help build the portal, and someone to keep an eye watch on the updates and customise things based on user requirement.
Here are some good example of benefit of drupal:
The Drupal Advantage
* Most popular and most powerful open-source CMS
o huge install base
o massive, active development community
* Drupal is a CMS and an effective application framework
o clean, extensible code base
o many high-quality modules available for add-on capability
o keep custom, proprietary code to a minimum
o build highly functional custom modules to accomplish practically any task
* High performance
o built-in caching
o integrates easily with 3rd party caching mechanisms
o infinitely scalable
* SEO friendly right out of the box
o standards-compliant HTML/CSS
o capable of custom (HTML) page titles, meta descriptions
o customizable, friendly URLs
o simple Google Analytics integration (without writing or inserting code)
* Extremely well documented
* Mature, going into seventh major release
* Flexible, powerful theming engine separates content completely from presentation; a Drupal site's look-and-feel is limited only to the constraints of imagination and the modern web browser.
* Easy to install and support, runs on Windows or practically any AMP (Apache, mySQL, PHP) stack
* Notable Drupal Features and Selling Points
o Powerful taxonomy system for categorizing content
o User registration and profiles
o Role-based permission system
o Out-of-box RSS feeds
o Browser-based administration
Web sites running on Drupal include:
* The Onion, http://www.theonion.com
* Fast Company, http://www.fastcompany.com
* The Pulitzer Prizes, http://www.pulitzer.org
* Churchill Downs, http://www.churchilldowns.com
* The Kentucky Derby, http://kentuckyderby.com (built by Digett 2004 - 2008)
* Warner Brothers Records, http://www.warnerbrosrecords.com
* AOL Corporate, http://corp.aol.com
* Popular Science, http://www.popsci.com
* thousands more, including virtually all those on Digett's portfolio page
More sites using drupal: