Even if its not about what you prefer, if its what serves your purpose, in the year 2015, you might want to migrate to WordPress, from what ever platform you are. As a member asked today at our Biggest WordPress Group – WordPressians, I had to digg a little bit, found few tools and resource, so wanted to share for future reference.
Maybe start with reading those article
Joomla To WordPress Migration: Presentation
Joomla To WordPress Migration: Guide
Joomla To WordPress Migration: Codex
Joomla To WordPress Migration: Plugins
Joomla To WordPress Migration: Script
Joomla to WordPress converter
This one is most interesting, just edit config.php with your setting, and run the converter as you need. It will work directly, and import posts, comments, user, category into WordPress directly. Only issue is its not updated in last 3 years, and as Joomla's version compatibility is super weird, so can't be sure if hat still works. And yes, its from my friend Tareq Hasan.
As You Know:
I am die-hard WordPress Guy!