Thanks! I did, though now working at another co and spending my free time generalizing this into a library that makes this paradigm easier to adopt (basically Redux-ifying your backend but with end-to-end encryption on the stored event logs). The initial version should be ready to publish in the next few weeks :)

If you remember, please email me or contact me on Twitter when it comes out! I'd love to check it out. And I'll definitely pass it along to the Prevayler community, who I'm sure will be tickled.