Those don't have money to fund studies about industry best practices. So you don't get many.
Almost everything you see on how to use a DBMS is an amateur blog or one of those studies. One of those is usually dismissed on any organization with more than one layer of management.
> Those don't have money to fund studies about industry best practices. So you don't get many.
Your comment reads like a strawman. I didn't needed "studies". It was good enough if there was a guy with a blog saying "I used postgres as a message broker like this and I got these numbers", and they had a gitlab project page providing the public with the setup and benchmark code.
Almost everything you see on how to use a DBMS is an amateur blog or one of those studies. One of those is usually dismissed on any organization with more than one layer of management.