A very long term plan is to have some sort of cloud offering, although it's quite far out there at this point. The main goal generally is to be a very-easy-to-use, pure python database with minimal third party library dependency (or none if possible) for "micro"/embedded workloads, the database being free and open source as it is currently. Quite a few people have found it useful to use CogDB in Jupyter/Colab notebooks- so that is one area of focus currently. There are some creative ways you can use CogDB as a storage library in web applications that could make it scale for some "reasonable" workloads- this is another area of future exploration. And lastly, GraphQL support is another area of focus.

There is at least one implementation of a graph database (in Python universe) on top of SQLite that I have come across, although I think it was a bit different in terms of features, query language etc