tl;dr:"Software development teams have a few key characteristics that make them efficient, even at scale:" (1) Specialization of specific roles. (2) Modularization, as problems are broken into chunks. (3) Clarity of ownership. (4) Organizational buy-in that tech debt needs management. Bryan argues that the structure around data teams are in different place for each of the above characteristic, and we are at a "tipping point" for this to change.