Only slightly familiar. Binary number systems are explained in introductory first books on computers. I knew binary nearly 10 years before I got my hands on a computer.

If you want base-2 then use kibiBytes (kiB) and move on..

For communications they mostly haven't (we tend to deal with decimal clock rates, bandwidths, etc-- and even when we have 128-QAM or whatever that's going to not result in powers of 2). For memories and caches we generally like them to be powers of 2 to use all the bits of our addressing and decoders well. For secondary storage, ... we tend to have a non-round number of lumps that are a small power of 2 sized, and we might as well use decimal.

This is subtle and has been woefully inconsistent. It would be better to just use powers of 10.

(Me of 20 years ago would be very disappointed in myself for writing this comment).