Many parallels to the negative feedback AOP received when it first appeared on developer horizons. It took a while for people to see where they did and did not fit logically into their problem solving toolkit. I can't predicate the future but Macro's fit into a similar bucket. I don't see them as a tool I would apply everyday but on the occasion I needed them the alternatives are blunt instruments.
I'm certainly not an expert in this area and have only toyed around with the SIP and Retronym's examples so take everything I say with a huge grain of salt. But I do hope everyone critical of the SIP and the concept has at least done the same.