(I think the idea of "class for which there is no ref type" is a
non-starter; for all of the types you talk about (vectors, etc),
you could make the same argument for `int`, but no one is saying
we don't need `Integer`. I think what you are really getting at
here is coming back to some form of "I want val-default".)
There are types which should never be null for different reasons, for
those types having a reference projection is an issue.
A nullable int is something useful hence we need Integer, sadly not
all the value types are like this.
Yes, they are. If you ever want to call a method reflectively on a
value object, you have to pass it to Method::invoke, which takes an
Object. That's a reference type.
