[progmetaldev]

You can also use DI without having to use interfaces for everything. It's easy and possible to inject straight dependencies from concrete classes into constructors, without all the abstraction (beyond allowing constructors being called for your dependencies and injected into your controllers). I'm a big fan of using services with an unabstracted database context from EF Core, rather than ever making use of repositories. I can still go from a MVC project with concrete views, over to Web API with a completely JavaScript frontend framework, without needing to change any of my business logic. Approximately 10 years ago, I was lost in all the abstraction you'd find in tutorials and any book on ASP.NET MVC, but experience has taught me a LOT, as well as working with other languages and seeing the (lack) of ceremony needed to get things done.