[vacri]

> I'd seriously question the judgement of any senior engineer who picks it for a new project over rethinkdb or Postgres.

... you mean RethinkDB, whose future is still uncertain? Regardless of technical merits, the currently unstable future of RethinkDB means a senior engineer should be extremely cautious about selecting it for a significant project.

[zzzcpan]

To be fair, choosing a scalable database even for a senior engineer still requires quite a bit of very specialized knowledge in distributed systems that most simply don't have. So they have to rely on what "feels right" anyway, rather than making an engineering decision, and are very susceptible to all the marketing and PR and authoritative opinions. There are no right choices for them. Although if in doubt everyone should probably default to a dynamo-style db, as it forces you to think about and organize your data in a certain future-proof way, which actually excludes all of the mentioned databases.