GP made a statement about the entirety of the team that they were familiar with. It's the same way that I can tell you with decent certainty that nobody's using MongoDB at my place since `kubectl get pods -A | grep -c mongo` prints 0.
EDIT: Okay, joke's on me there. It turns out the automated frontend tests use a Mongo for some reason. :)
It was more of an observation by looking at most production systems, reading tons of docs, talking to a LOT of people who built the legacy - the stuff that's on your phone and in your car right now - and building a few modern systems over the course of ~2 years.
EDIT: Okay, joke's on me there. It turns out the automated frontend tests use a Mongo for some reason. :)