Why no `sizewindow` statement?

Is there a reason why the sizewindow statement was not carried over from Panorama 6?

“You can’t have everything … where would you put it?” – Stephen Wright

On a more serious note, this is on the my list of items that aren’t done yet. It’s a low priority item, though.

This reminds me of the problem faced by the inventor of the universal solvent - he had nothing to store it in.