I think it’s also the SI standards pedants who can’t imagine a kilogram might be a different context than a kilobyte.
Practically, physical objects need built. If you're not doing it yourself you've got to work within the limits of your suppliers or push them.
The argument is that the base10 interval makes no sense with computers, because they're physically base2.
You can't really have 10 without wasting 2, and that's why it made sense to use 1024 instead of 1000.
Personally I feel the pushback against gibi/mibi/kibi overblown. It's ultimately better to be coherent everywhere and always specify everything with decimals/rounded over random context dependent decisions. But still, the original argument for 1024 made sense too.
1 or 8, depending.
Unless you have some well known powers of 2 you have to calculate anyway.
To be able to convert easily from byte to gibibyte, mebibyte, gibibyte, etc. is a bigger benefit. Just moving the decimal sperator to convert the units is big advantage of the metric system.