> We feel very comfortable that it's the most performant backend for persistent games though.

Depends how persistent you really need it to be. If rolling back a few minutes is tolerable in exceptional scenarios then I disagree. It will be more performant to keep state in engine and snapshot whatever you need to save every few minutes. That's pretty much what most games do now.

> This is not correct. It's mostly processing player movement transactions. We do about 50 million an hour.

I said gameplay, not processing time.