You can use it for "what if" analysis. - Take a fork of the database - Transform data in the fork. i.e. costs+5% - Point your current queries to run on the fork

You can see how with just the effort repointing queries a reporting app could show the real world and the world you are modelling.

That’s helpful, maybe I’m naive but isn’t that like an Excel workload? I haven’t seen scenarios where the entire database needs that kind of functionality. Can you elaborate on what kind of data and business problem one would be working on where they need that level of robust versioning?

I always figured 'model zoo' was a general term for for a collection of trained models.

I would recommend micropython on the esp8266 as then you can use the same code that was running on the pi with a few tweeks. https://github.com/micropython/micropython/tree/master/esp82... http://docs.micropython.org/en/latest/esp8266/