I'd put the shift even later than that. 2015 maybe. I think 2008 redirected a lot of people who would have gone into "Business" in the abstract towards tech, eroding the prior engineering culture, and then it took a few years for that crowd to establish themselves as a relevant voice in the community.

Looking back, the reaction to Aaron Shwartz's death in 2013 was, IMO, indicative of the older culture. It definitely felt like a minority viewpoint by the time Covid rolled around. So, somewhere in there.