[juhatl]

You make a good point, and this is one of the reasons why I really like the Phoenix web framework (of the Elixir ecosystem). It firmly guides you towards building applications where Phoenix is only a single interface to your underlying Elixir application, and the web layer, by design, doesn't contain business logic, but rather just gives you a web-friendly way to talk to the application itself. The community has come up with the mantra of "Phoenix is not your application" to drive this point home.

This approach and separation of concerns also means that building e.g. REST or GraphQL APIs on top of your application is simple, as your web framework has no say in how the data is actually structured or queried.