Why act so snobbish about it? They're both cromulent databases. You should try doing one project with each. The converse of this list would tell the diehard postgres user that mariadb is irrelevant to him.

They have quite different internal design, this affects what features are possible. No clustered index in postgres for instance, and UPDATE can reorder rows, but it supports replication much better.

That's totally fine, there are many workloads where Postgres is the best choice! I'm not forcing you to use it, I was just responding to the comment upthread about lack of advantages. It's kind of bonkers that the anti-MySQL crowd is so rabid that any attempt to explain legitimate use-cases for MySQL is met with a barrage of downvotes, especially in a submission that is directly about MySQL specifically :/