I'm old enough to remember what MB and GB meant before sleazy marketers started to redefine them. They should have been sued for deceptive advertising. Instead the computer press of the time was spineless, because guess who paid for the ads.
Since mega- and giga- haf well-established meanings as prefixes to measures, and the original common usages of MB and GB were inconsistent with those meanings, I prefer MiB and GiB for those uses, even though it took marketers using the correct versions for devious reasons to get terms popularized that distinguished the base-2 prefixes from the close-but-not-the-same base-10 prefixes.
So I refuse to be a wuss and use MiB and GiB.
(Also, get off my lawn.)