The problem with Postgres is that out of the box, it is not much different from SQLite in terms of availability and scaling. You need to add a Pgbouncer before

The problem with Postgres is that out of the box, it is not much different from SQLite in terms of availability and scaling. You need to add a Pgbouncer before it can handle multiple connections, and you need a really complicated dance to make it highly available, with read replicas and hot standbys. This is why I prefer MongoDB for that matter.