Why aren't there more plays about quantum physics?

Saw an excellent play last night, Hapgood at the West Yorkshire Playhouse. For those who have no heard if it, it is a Tom Stoppard play about spies and physics set in the late 80s.

I know of two plays that take their theme from quantum uncertainly, this one and Copenhagen, both nights out I have really enjoyed. They are plays that keep you guessing all the way as to what is really the truth (if such a thing can ever be known).

I have always liked stories within stories, one of my favourite books is the Arabian Nightmare a story in which you never truly know who is the narrator until the very end due to the layer nature of story telling.

All these go to show you never can know as much as you would hope for.