Types exist to help you organize your code. Const (for classes) just promotes the misguided idea that you should design objects with mutable and immutable parts at the same time. The main objection to this is that your objects should be either value objects (therefore immutable) or reference objects. There is no need for const if you design your classes in this way. On the other hand, the const idea requires you to spread "const" everywhere you might want immutability, otherwise the compiler will fight you at each line of your code. Either way, it is a loss-loss proposition.