Whenever I come across these types of almost-rants, I never know: Is he talking about some specific use cases in which Postgres completely dominates MySQL? Or i

Whenever I come across these types of almost-rants, I never know: Is he talking about some specific use cases in which Postgres completely dominates MySQL? Or is it that for literally every CRUD call I do in my app I'm having my users wait a pointless 200 ms when Postgres would be doing the same in 20 ms ... What's the deal? Is the difference that drastic and relevant that I should really switch immediately even for ongoing projects, never to look back on MySQL again ?