"Open-source typography is flourishing, but that doesn't mean commercial typography is dead"
The two should also not be opposites. There should be room for commercial open-source typography.
If it isn't the typography world is going to be poorer - coz designing good fonts is a hard, skilled, time consuming task and not everybody has the time and inclination to do it for free.
(Otherwise we're going to see more things like the recent non-OSS fork of Merriweather for example http://ebensorkin.wordpress.com/2014/03/02/the-pro-merriweat...)