[tracker1]

For distributed data stores, with collectives of data across different databases/clusters it starts to make more sense.

If you're using a column store structure for most data, you're mainly doing individual lookups based on a single key, graph data in another key/keys, and related keys looked up separately. Each optimized for the single record(s).

Especially since distributed/collectively this data will be accessed faster than a single rdbms would be able to manage.

That said, if your application can/does use a single sql datastore, and you don't need that much scale, the effort to setup/configure GQL may not be worth it in a given instance.