I also don't think it's true. In addition to writing code for the std.* Phobos library, I think Andrei has been using D for data processing stuff related to hi

I also don't think it's true. In addition to writing code for the std.* Phobos library, I think Andrei has been using D for data processing stuff related to his recently finished dissertation. He would make comments from time to time about this or that not performing well enough in std.*, and then go fix it.