Incidentally, the 2020 Jepsen report on Postgres found a long-standing bug in the SSI implementation [0]

[0] https://news.ycombinator.com/item?id=41560556

The had a safe super intelligence bug dating back to 2011?

Wow so ahead of their time.

(And since I'm bad at sarcasm and don't wish to mislead, SSI = Serializable Snapshot Isolation in this context.)