I would hardly call it old fashioned. SI prefixes were just mis-applied to storage sizes, hence the more correct use of kibibyte (kiB) [0], mebibyte (MiB), etc.

I would hardly call it old fashioned. SI prefixes were just mis-applied to storage sizes, hence the more correct use of kibibyte (kiB) [0], mebibyte (MiB), etc. Hence also Apple's somewhat recent switch to using 1 kB = 10^3 bytes. [0] https://en.wikipedia.org/wiki/Kibibyte https://en.wikipedia.org/wiki/Kibibyte