Just? With all the Claudisms it is hard to distill what really happened. My guess:

- Our oversell protection was a gross hack that broke ACID.

- MySQL has a new feature that allows us to remove parts of the gross hack.

- Question: To what extent does the hack still exist?

Instead you get garbage like "The answer is often in the plumbing, not the engine." and "Crucially, this wasn't about making reservations fast. It was about making them safe neighbors."

But this crap is what Lütke wants, so they deliver.