Maybe you're right. Physical/behavioral differences were bigger, but fears based on them were simpler. As in your wolf/dog analogy - maybe they weren't developed enough to make a big deal out of it.
(I don't have any big opinions about the effort, I just wanted to hear what was the database chosen that was able to track all different data formats... and it could have been sexier, but yes - Postgres would do.)
Blown away, by both the adaptiveness of the platform and software. It feels like the flexibility that I'd want for all of my prototyping experiments. Signed-up, and patiently cheering from the side-lines.