My personal preference for composition over inheritance is that it forces callers to call the owned-object’s methods directly rather than automatically through inheritance.

There is more typing/boilerplate but when you read the class file you get a full picture of what’s happening rather than some parts happening automatically in a different file.

I like to say that code should be written with a reader bias: the singular writer should do more work if it makes the class more obvious for the multitude of readers. I feel like composition is a good example of that.