I think Rethink would be that, but I don't know, I've never found SQL databases that hard to manage. I've found NoSQL databases hard to manage, because, invariably, someone will be doing a write right when you're trying to do a data migration/transformation, and now you have a single record that looks wrong, and it's a bug waiting to happen on read, rather than on write (where it should).
Rethink definitely had its use cases, I just never saw it as my primary data store.
Rethink definitely had its use cases, I just never saw it as my primary data store.