Kryder's "Law"
I don't think it deserves that title when he only said it in 2005 and we diverged from it only five years after. Maybe "Kryder's Fallacy" would be more accurate?
What I wonder is, how much did SSDs have to do with this? That's eliminated the high end disk drive market. There is a lot less future profit available to fund research that results in aereal density increases. Right about the time that GMR was starting to run out of steam, everyone knew that NAND would soon approach the densities required that would allow its use as a true storage tier, rather than a niche/botique option for special cases. The R&D money was poured into SSDs, and hard drive density increases have dimished because hard drives have only a low profit commodity market remaining.