[joshmarlow]

The database branching idea seems to be popping up more and more. IIRC, TermniusDB supports it too - https://terminusdb.com/

I've not played with PlanetScale yet, but I am planning on playing with TerminusDB in the near future.

[LukeEF]

Yes - branching both schema and data in terminus - becoming more JSON oriented too with a new document API