Tl;dr: scale Rails! (If by scaling you mean running N databases so you can parallelize your test suite with N workers, and run more than one database in product

Tl;dr: scale Rails! (If by scaling you mean running N databases so you can parallelize your test suite with N workers, and run more than one database in production) I didn't see anything in these slides that lead me to believe there's anything to address the actual failures behind Rails scalability problems.