> Reading this article it seems like yet another example of "you don't have big data".

Yes definitely. This thing was a big exercise in "You aren't going to need it".

> so in the end it's mostly...just an app talking to Postgres?

Yes. We solve problems for our customers. It's nice if we can do that without also creating problems for ourselves :)

> seems like they've been jumping on bandwagons before

Just wanted to point out that this system is also written in Haskell. We didn't really switch bandwagons.