This site is currently (June 2011) built on Joomla! for a variety of reasons. When this latest iteration of the site was put together, Joomla! was far and away the best choice, but not because of any inherent superiority over WordPress or any other platform for that matter.
It was the best choice because it was the platform I was most familiar with, and most able to bend to my will and whim.
Since then, Joomla! has moved on. WordPress has moved on. I have moved on. A significant number of projects recently have been more focussed around the simplicity of WordPress, and less around the need to extend and expand Joomla. I have, for various reasons, become familiar with what it takes to translate a design from simple mock-up to a fully fledged WordPress template that will cope with future changes and inclusions.
This site, too, has evolved in direction – I no longer need the ability to customise the platform in the ways I originally did, and, with increasing familiarity with WordPress, those areas that I do need customise can be accommodated in WordPress with the level of knowledge that I have.
Instead of using Joomla! as if it were WordPress, I can now use WordPress as WordPress, and add in the Joomla! goodness that I need, if I still need it.
The transformation begins. Then the migration…