People that stare themselves blind on the diff numbers forget the entire principle behind the difficulty increase in crypto currency. THE INCREASE IS NOT LINEAR OR EXPONENTIAL! Diff increases are based on available hash power.. The increase curve should follow the same pattern as when GPU took over from CPU. Sharp spike in the diff while the processing power shifts from one technology to another and then a plateau or even drop once it's adjusted.

ASIC is nothing magical, once diff increases to the point that ASIC is no longer wildly profitable it will stabilize and ASIC will still be ROI+ until next generation of ASIC or new tech hits.

I don't get this number obsession, it's pure logic at work here people.