I kind of like interfaces as they are basically less powerful traits. I think there is a big difference to class inheritance and the difference between e.g. Jav

I kind of like interfaces as they are basically less powerful traits. I think there is a big difference to class inheritance and the difference between e.g. Jave and C# is just syntactic. When you implement interfaces you have to explicitly implement all methods. If you implement them correctly all methods using them continue to stay correct (including C# extension methods or java interface default methods). With class inheritance you have two large problems: you also inherit state that you might not need, might not have access too and might change in future versions of your base class. Secondly you might need to override methods of the base class to provide correctness. If your base class adds/changes methods your subclass can easily behave wrongly.