We're talking about a different level of "easy" I think.
Easy: asking devs add a gem to their app.
Hard: asking them to write migration code of any kind, much less understand tablespaces and replica placement.
You're advocating something we spent a lot of time trying! Boring Postgres read replicas worked for almost everyone we worked with, and it works for the vast majority of what full stack folks are already building. Our infrastructure will work great for the ones who need Cockroach/Yugabyte, too! That's specifically why we covered it in our post. :)
