I think it'd be an oversight to not stay on top of the new technologies that scale better. A document store fits a lot of problems much better than doing every

I think it'd be an oversight to not stay on top of the new technologies that scale better. A document store fits a lot of problems much better than doing everything in Postgres, and offers easier maintenance and replication. And can offer a lot simpler architecture when all is said and done. But yes, obsessing about scaling on an app that has no users can be a very big time sink. Much better to just hack out some software with whatever tools are the most productive, and get a few customers to drive the human side of business requirements.