> that's because it was defined in decimal from the start

I mean, that's not quite it. By that logic, had memory been defined in decimal from the start (happenstance), we'd have 4000 byte pages.

Now ethernet is interesting ... the data rates are defined in decimal, but almost everything else about it is octets! Starting with the preamble. But the payload is up to an annoying 1500 (decimal) octets. The _minimum_ frame length is defined for CSMA/CD to work, but the max could have been anything.