Contrib module APIs change as much as Drupal core APIs. It would be nice to have a way to provide Retrofit extensions for contrib modules so they can be supported without adding code to Retrofit itself.
The goal here would be to simplify hooking into the Drupal service container. That may mean an "extension-installer" like PHPStan has. Along with other helpers along the way.
Contrib module APIs change as much as Drupal core APIs. It would be nice to have a way to provide Retrofit extensions for contrib modules so they can be supported without adding code to Retrofit itself.