"Team Expertise" == Process people tend to form conglomerates, and productive talent tends to form pockets of chaos. These roles are both foundational concepts, and diametrically opposed to each other. The suits always win in the end, as they have a singular focus.
"Customer Expertise" == learning about the 4 types of customer, then why 3 out of 4 types are essentially irrelevant to a profitable business.
Its funny, because it is true =)