Nit-Pick: It might be anti-marketing, still it would be helpful if the use cases can be articulated in a way where it would make sense to use this Vs any other type of database. Honesty goes a long way with the more technical folks for anything related to infrastructure.

Surfacing where and how PG is better than Dynamo or any other database is probably a good starting point instead of calling out PG a silver bullet for everything. At the end of the day its all a trade-off.