They both require persistence semantics. I forgot to mention, I was referring to a single node, no-HDFS setup for HBase, solely relying on Kubernetes StatefulSets for data availability, in the simplified persistene sense, not much different than a single Posgres server.
Under those conditions I'd agree theres likely a high overlap of similarity. I have a use case on my home playpen that would likely be served well by that. Thanks for describing your approach.