I think Stevie plays those same songs over and over again because those are very popular songs that even someone who doesn't regularly listen to FM would know those songs. There are probably many fans who come to the concerts who are really only aware of the Rumours stuff and they expect to hear it.
Of course I would love to hear some of her lesser know songs especially Storms. I think I Don't Wanna Know would be great for her and Lindsey to do also.
