If you need scaling. Not all applications need scaling (e.g. I'm doing an internal tool for a company that has 1000 employees, it's unlikely that from one day t

If you need scaling. Not all applications need scaling (e.g. I'm doing an internal tool for a company that has 1000 employees, it's unlikely that from one day to another that number of employee will double!), and for most applications a single PSQL server either locally or in the cloud is enough.