If there's one thing that drives me potty it's people who claim that mysql is too slow for their requirements (usually low-medium traffic website), then I look

If there's one thing that drives me potty it's people who claim that mysql is too slow for their requirements (usually low-medium traffic website), then I look at their implementation and see no indexes on non primary-key fields. Before NoSQL was a thing, I saw people break their data out into 1000s of .txt files to get around this.