Working on MEP22, I have been trying to find the right place to put the draw_rubberband method. That is specific to each backend.

One question arises:
What is the need for this method if we have matplotlib.widgets.RectangleSelector?

For what I can see, draw_rubberband dates prior to 2004, and RectangleSelector dates to 2005.
Maybe, and this is just a wild guess, mpl keept the rubberband just because it was there before.

Is there any technical reason for the existence of both? what would be the problem of just getting rid of rubberband and using RectangleSelector