I never realized MySQL was so far behind (though I’ve also not touched it in many years, intentionally). Is that the case for MariaDB as well, or does the real development take place there?
In the MySQL ecosystem, more effort is spent on performance and stability than new features. MariaDB is definitely one of the more experimental of the MySQL flavors. You can mix and match to some extent, though. We use MariaDB’s multiple replication streams to perform shard merges, but actually serve the data from Percona. WebScaleSQL is pretty interesting too, and represents the efforts of a number of giants to make the platform more robust.
Thanks for this, @kb / Kburke! I was really impressed at how much there was in here.