I would support the "superdoc" idea--but I also think that in some fields, we need to allow graduate students (and postdocs) a certain amount of time for career

I would support the "superdoc" idea--but I also think that in some fields, we need to allow graduate students (and postdocs) a certain amount of time for career development. If someone wants to do a PhD in physics because they love it, but wants to pick up some CS or finance courses along the way to hedge their bets, we should encourage that...