I think this is an important point, and I know it often derided as people asking a company to give something away for free, so I want to defend it.

I admire Cognitect's ambition in going up against big database vendors as a small team, and creating something very unique. That said, as a user, it's frustrating that when I get an error I can't just pop open the source and see what's going on. It's frustrating that the console could use a few usability improvements that an interested OSS developer could add, but that don't happen. It's frustrating that the Client wire protocol hasn't been released yet, so support for non-JVM languages (which are provided by the community and do not have official Cognitect support) are stuck using the deprecated and unsupported REST interface.

I am not ideologically against proprietary software, I just think Datomic would be orders of magnitude more useful with an active OSS ecosystem around it.