"Yes, yes, you've heard plenty of old timers talk about the early days in the computer world, but bear with me. When I started out in the Aerospace business (1983), the hard disks used by our minicomputers were of the order of 10MB, they required an air-conditioned room, they weighed several kilogrammes, made an absolute racket and cost a fortune.
Contrast that to today, with hundreds of Megabytes being given away as freebies by newspapers and at conferences, with 8GB (i.e. 8000MB) now available in microSD form, on a solid state sliver of silicon that I can barely see and that weighs around a gramme.
So let's get this straight. In 25 years, I've seen capacity go up by roughly 1000 times while disk mass/volume has gone down by around 1000 times. So around a million times more efficient, then."