@sborrill
Indeed this started somewhere when we had hundreds of megabytes of space for hard drives. For me, clients were told beforehand that the space on the drives was calculated in decimals. I simply told them that because of a conversion system the drives are actually (much) smaller in raw capacity. Some of the clients were semi-technical and knew about the binary system used for hard drive space before.
Those I could tell in detail about the marketing ploy, to sell drives which are under capacity and Market them as higher.
For me the annoying thing is that Storage Systems are still sold with incorrectly displayed capacities.
And since drives will become really large soon, we'll have 32+ terabytes of drives available for consumers, it will be harder _no_ it will be an unnecessary **extra step** to calculate how much raw capacity the drive actually has
Meanwhile in the 80s you knew exactly what the raw capacity was, because they were properly stated by the manufacturers