Has any one tried to build a CMS upto the size and complexity of Joomla or EE on CI?

[eluser]John Fuller[/eluser]
If I needed a Joomla, I would just use Joomla. Trying to build something like that on CodeIgniter seems like a waste of time unless your name is Ellislab. Look at the the developers they have and the hours that have gone into building the system. The beauty of CI is that you can rapidly build exactly what you need. This means you don't have to deal with the daunting challenge of having to build a Joomla for every project. If developers had to do that, nothing would ever get done.

If you want to do something for the CodeIgniter community, there are probably a lot more interesting libraries that could be added rather than building yet another CMS.