Two opposite thoughts reading this article (I was Sonora user since its 1.0 beta version till current 2.0 beta):<p>1) Their decision gives another cool project open source as TextMate 2. On the other side iTunes 11 seems to take a lot from Sonora application and all iTunes users win from it.
2) Corporations copy key ideas of small developer groups and such developers aren't protected from losing their revenue.