I've now had a read through the Jepsen report on ParticleDB. I could quote extensively because there are so many good bits, but here's the money shot:

Given the severity and extent of the safety errors we found, and the process which produced them, Jepsen recommends users halt further deployment of ParticleDB and migrate to other databases as soon as possible. Consider checking and/or rebuilding database state from more reliable sources, if available.

Orkes Inc actually paid for this recommendation to stop using their product and switch to something else.