Underlying storage doesn’t actually care about being in powers of 2^10 or anything, it’s only the controllers that do, but not the storage medium. You’re mixing up the different possibilities to fill your storage with (which is 2^(number of bits)).
Looking at triple layer cell SSDs, how would you ever reach a 2^10, a 2^20 or 2^30 capacity when each physical cell represents three bits? You could only do multiples of three. So you can do three gibibytes, but that’s just as arbitrary as any other configuration.
Underlying storage doesn’t actually care about being in powers of 2^10 or anything, it’s only the controllers that do, but not the storage medium. You’re mixing up the different possibilities to fill your storage with (which is 2^(number of bits)).
Looking at triple layer cell SSDs, how would you ever reach a 2^10, a 2^20 or 2^30 capacity when each physical cell represents three bits? You could only do multiples of three. So you can do three gibibytes, but that’s just as arbitrary as any other configuration.