I do not agree. Very often, when using libraries for example, you need some extra custom handling on types and data. So the easy way is to inherit and extend to a custom type while keeping the original functionality intact. The alternative is to place the new functionality in some unrelated place or create non-obvious related methods somewhere else. Which makes everything unnecessary complex.
And I think the trait system (in Rust for example) creates so much duplicate or boilerplate code. And in Rust this is then solved by an even more complex macro system. But my Rust knowledge might just nog be mature enough, feel free to correct me if I’m wrong…
I bit the bullet and bought the Jetbrains Ultimate bundle because I develop in lots of different languages. It includes WebStorm and it is a joy to use. It helps where necessary and doesn’t get in my way…