Eh, it's a reaction against people making or reaching for the wrong tools or the right tools but at the wrong scale. Postgres is very very good. The vast major

Eh, it's a reaction against people making or reaching for the wrong tools or the right tools but at the wrong scale. Postgres is very very good. The vast majority of use cases work with it with very minor effort. People would, in general, be better off investing in thoroughly understanding a general tool like postgres (or similar dbs, just pick one to learn, but there are reasons why you would pick postgres over, say, oracle). There are still reasons to use more specialized DBs. But the push for postgres is because very often the people reaching for those specialized DBs do so in error. 20M rows is practically an in-memory dataset, for example.