It's easy to have that view when giving away something not that many people are interested in. Once you're a platform full of media, entertainment and social connection you have to find a way to keep serving billions of users.
I don't know D so I'm probably missing some basic syntax. If pointers cannot be copied how do you have multiple objects referencing the same shared object?
It's like how talking about the "hockey stick curve" in an exponential growth line is nonsensical. It's everywhere and the curve angles you see depend entirely on what scale you view it from.