Hi Sarah, interesting info. However, EllisLab founder Rick Ellis is quoted as saying that "over 90% of the CMS market is open source." And according to w3techs, WordPress has a CMS market share of 59.5%. So how much of the CMS market would be open source w/o WordPress?

The somewhat successful Concrete5 has been open source since 2008 but its CMS market share is still a paltry 0.2% according to w3techs - even worse than ExpressionEngine's 0.3% market share.

Plus several non open source CMS options have much higher market share than open source Concrete5 (Squarespace, Weebly, Wix, etc).

So being open source is only one of several factors to consider. For example, according to techspot.com, open source Android has 61% of the US smartphone market, and iOS has 38.7%. But I doubt many people believe iOS is a failure and Apple should make iOS open source (plus most people seem to agree that iOS provides a better and safer user experience).

In other words, ExpressionEngine apparently failed at competing with non open source CMS competitors. So now it's so desperate it's going open source thinking it can take on the biggest CMS in the world? Do they know something others such as Joomla, Drupal and Concrete5 don't know? I wish ExpressionEngine great success, but they're definitely facing long odds.