Really? Coming from PGSQL to a MySQL-only shop made me really miss PGSQL's performance. Sure, MySQL is faster on `select pk from tbl where pk=1`, but the second you get into complicated joins, including subqueries, or doing any analytics the performance is very random.

With pgsql, I can get a clear concise explain and if I disagree with what's happening (because I know exactly what my hardware is capable of) I can tune any query to be decently performant.

With mysql, you get... I mean explain is ok, but I wouldn't put it above that. "EXPLAIN ANALYZE" is my gold standard forever and ever. I even liked it more than SQL Server's equivalent; which is also fantastic.