Why would Map<K, V> save any keystrokes? You should not be implementing it yourself anyway, and when using it, you replace K and V with concrete types anyway.

Why would Map<K, V> save any keystrokes? You should not be implementing it yourself anyway, and when using it, you replace K and V with concrete types anyway. > I suppose clearer is a question of semantics, but to me there's not any more information conveyed by writing List<Value> vs List<T> - we already know T is a "Value" (because it has to be, due to List). Yes, I agree. However, think about functions taking 3 or more generic parameters. There's a much larger need for better information in that context