> As a user of KV stores and graphdbs myself I would have to use a traditional rdbms. It's been an absolute breath of fresh air being able to express queries in a graph-oriented way. For me the combination has been totally "better", but of course, that's not evidence based! Nor, really, could it be.

Well, it's anecdote. But if a statistically-significant number of people feel that it's "an absolute breath of fresh air", that's totally "better" in a very concrete sense.