[boost] Revitalization

Hi all, At C++Now this year I gave a talk on the status of Boost and presented this graph which illustrated the trend of Boost mailing list participation. https://docs.google.com/presentation/d/1ocX8Dh4B98gxfXJTWOriaEU1tmJN61M4RfjU... I'm interested to hear your opinions as to what happened over that time period to cause such a trend. There's truth to the claim that this question is being asked of the wrong people; those who left, stopped participating, or would otherwise start probably have good insight. Nevertheless, I think it would be interesting for us to brainstorm on this. Thanks in advance for your thoughts. -- David