Kilo comes from greek and has meant 1000 for 1000’s of years. If you want 2^10 to be represented using greek prefixes, it better involve “deca” and “di”. Kilo (and di) would be usable for roughly 1.071508607186267 x 10^301 byte. KB was wrong when it was invented, but they were only wrong for decades at least.
I only program non-seriously for work on occasions and I’ve rarely used copy/pasted code. Except maybe some of my own code because of using lazy logic trees to deal with variation in the data being processed. Doesn’t need to be pretty or efficient. Just needs to work well enough so I do a less manual work.