Why Uber dropped PostgreSQL

If the response to a logical update failing to apply is rejecting the update, then you know that your replication is broken, and you haven't lost anything except the most recent changes - and you can skip that update and apply something manually to fix it while you fail over to a replica and bring it as close to up-to-date as possible.

If your low level data structures are corrupted - better have a good fsck and/or good backups, because you have have no replica with consistent state any more.