Google responded to the IAB in full about ongoing privacy sandbox
concerns @ https://docs.google.com/document/d/10608Tp57alonCiBN9D2-0UfV_C6FFLsV5nh6sBaA5rA/preview#heading=h.si8ssexm0ul6 but I made some edits I thought were missing:
Privacy Sandbox response to IAB Tech Lab's Fit Gap Analysis for Digital Advertising

Google Docs