I once fixed a bug in credit card payment form because someone had gotten some formatting character screwed up and used a capital M in some place where a lower case m should have been. Since it was a payment system they couldn’t take payment for a while whilst that was screwed up. I was contracting there and happened to notice it. Sometimes all it takes is one character.
Typing characters is maybe 1% of the job. The other 99% is understanding how the change affects everything else. Changing a single line of code in a function called by 1000 other functions each themselves called in 10 other functions can still potentially be more work and a bigger change than changing 9000 lines of code in a function called once.
Using legacy SI units for size of information is deprecated, they only bring confusion, instead use IEC/binary units like GiB (gibibyte). en.m.wikipedia.org/wiki/Binary_prefix
