In 2019.

A LOT of people want MySQL over Postgres because of ignorance about how far Postgres has came and they don't know/care. I try to explain why I like transactional DDL and the guardrails that come with Postgres.

With MySQL you end up having to use Percona to get a really robust DB setup with proper tooling that compares to Postgres in my experience.

Both, of course, have plenty of known and unknown knobs you can turn to your liking and can make either database appear to be better by any number of metrics for your use case.