I personally prefer PostgresQL, too, but MySQL does have one massive advantage: operations tooling and clustering options. There's a whole lot of documentation

I personally prefer PostgresQL, too, but MySQL does have one massive advantage: operations tooling and clustering options. There's a whole lot of documentation and an ecosystem of operations tooling (think Percona) and MySQL experts are much more numerous. MariaDB's Galera cluster is really solid and had years of production use now. Postgres is catching up, but for now, MySQL/MariaDB win in that regard.