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I agree; I wasn't advocating not testing. My point was more that the parent was overstating the risk, particularly around things like required schema changes, or data volumes no longer being usable. Those particular things aren't issues in my experience (for post-GA point releases), and I've worked at crazy scale.

The more common classes of problem are performance degradation, config options being added or renamed, new features being buggy in rare edge cases, etc. Not things particular to InnoDB's storage format or things that would prevent a volume from being usable with a different version.




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