auto provisioning is old
The article kind of makes it seem like provisioning a switch automatically is a new thing, the technology is probably 10-15+ years old. New for puppet maybe.
Myself I don't need auto provisioning, network isn't big enough to warrant the need. Even my biggest network which was about 70 switches didn't warrant auto provisioning (now a days that 70 switch network could be collapsed into a couple blade enclosures and a very small number of switches)
Provisioning core switches like edge switches, sounds scary too.