I think this is an excellent example of Stevie's appeal, and the reason so many people are endlessly fascinated by her (and why she continues to gain new fans all the time).
This demo blows the full-production album version out of the water. It's just her... her and her imperfect voice, and her unpolished piano playing... and yet the song holds your attention and keeps you enthralled.
It's honest, it's emotional, it's passionate.
There's more going on here than all the guitar parts and keyboard overdubs in the world could ever hope to accomplish.
At least in my humble opinion.
Johnny Stew