I think ledgers are underutilized in software development today. Specifically, double-entry ledger modeling would be a better fit in a lot of systems than the ad-hoc ledger-ish things they currently have. This is why I’ve been working on pgledger, a pure PostgreSQL ledger implementation. If adding a ledger implementation is super simple, then I’m hoping more folks will do it. And it can become another modeling primitive that we reach for to accomplish all sorts of things. What is a Ledger? A dou...