That’s a huge trap.

Yes, it’s simple at the beginning but it takes a lot of effort to move to non-port based solution for anything.

Cuts are small at the beginning (oh, this service should use other PostgreSQL, so lets have two - oh but I my code doesn’t specify port in an config file, so let me put on direnv - oops IDE didn’t pick up env file) but they grow quickly.

Containers are standard nowadays and allow going for Kubernetes if one wants. With solutions like Justfile or Taskfile its reasonably ergonomic.