Depending uponhowradicalyouridea is, youmay or maynot elicit a sympatheticresponsein those aroundyou (determining thefrequencyatwhichthefractal shapeappearsinthe overallimage).
Apple introduced its version, called Fusion Drive, that tiers storage on flash memory or a HDD dependinguponfrequency of use, but appearing to the user as a single storage device.
Dependingupon how loose you want to be with your statistics, thefrequency is either staying the same (conservative stats) or actually in decline (loosey-goosey stats).
Continuing to reduce the costs of on-line storage will require the management of stored content to optimize availability dependinguponfrequency of use and use of commodity storage and other data center equipment.