In this presentation, the presenter talks about the nice grep-ability of setState: (we refer to that as grepability around these parts)
https://docs.google.com/presentation/d/1afMLTCpRxhJpurQ97VBHCZkLbR1TEsRnd3yyxuSQ5YY/mobilepresent?pli=1#slide=id.g380053cce_1574
"you can quickly find all the points in your app where data changes"