I guess inflation is the price reduction we get. 23 cents in 2016 is 32 cents in 2026
GiB is unambiguously the big one, power of two. You want S3 to be priced in dollars per GiB. "shrinkflation power of ten GiB" is getting it backwards.
Amazon S3 storage usage is calculated in binary gigabytes (GB), where 1 GB is 2^30 bytes. This unit of measurement is also known as a gibibyte (GiB), defined by the International Electrotechnical Commission (IEC). Similarly, 1 TB is 2^40 bytes, i.e. 1024 GBs.
I guess they could just change that overnight in the future. Still, a lot better than charging for Storage Units or similarly arbitrary unit.