[erinan]

This has most likely to do with the codebase itself rather than with Elixir or Phoenix in your case.

And having to go through a few files to understand how a request is handled is not out of the ordinary in an app, especially if it's grown over the years?

[dnautics]

Tbh Phoenix has a lot of boilerplate and some... Opinions that make the codepath slightly more complicated (often for good reason... that might not apply to all use cases) in the default project.

For example:. What exactly is the distinction between an endpoint and a router?

[0x000000001]

Endpoint == instance of phoenix webserver. Changing things in the endpoint gives you WAF-like control and you can do some early footwork here and store useful data in conn[:private] for you to use later in the modules called in your router

You can have multiple routers. I just built a thing where foo.com uses one router for the main site and *.foo.com is something else.