I don’t see the unique advantages of MySQL compared to current MariaDB, PostgreSQL, SQL Server, CockroachDB, MemSQL, etc. In my case we switched to MariaDB bec

I don’t see the unique advantages of MySQL compared to current MariaDB, PostgreSQL, SQL Server, CockroachDB, MemSQL, etc. In my case we switched to MariaDB because it fixed a number of glaring query optimizer failings much sooner than MySQL. And we've stuck with MariaDB because it has been much smoother and confidence-inspiring than MySQL when we used that. We also use the TokuDB storage engine extensively, which is well supported by MariaDB. Whereas MySQL 8 is going in a very opinionated direction that I personally don't agree with.