This hits close to home — I was a heavy user/developer around ExpressionEngine from 2006-2008. I’m happy to see them come around to embrace an open source model.
When Rick Ellis, founder of EllisLab, was asked on Twitter “Why open source?” he simply said:
Open source has won. It’s not even a contest anymore.
Here’s a note shared with us from Derek Jones, CEO of EllisLab:
[ExpressionEngine] a popular commercial CMS with 15 years of continuous development has taken a huge leap and gone open source after watching the closed-source CMS market continue to shrink while simultaneously getting more crowded.