Very few. But there's a difference between having control over the codebase where you can start to split up the monolith, adopt event-based architectures down the line, i.e. having a strategy on how to deal with the problem if and when it becomes a problem, versus tightly coupling your business logic to a vendor that is tightly coupled to Postgres and therefore your options on how to switch away will be extremely fragile and expensive at best and straight up impossible at worst.