I wish Rails had a way to use less features. API mode is great, but when I'm writing a GraphQL API for instance, I don't use controllers, I don't use views, I don't really use routing. I do use the excellently integrated ORM, database migrations, auth libraries (mostly devise), config environments, deployment options and CLI interface.

I could just delete the folders, but that's not the point. Rails is sitting on an amazing foundation but there's only one possible house that you can build.