In 99% cases of "Why wasn't this (better) format adopted?" the answer is: * It's not actually better. * It's patented/requires license/is owned by someone who

In 99% cases of "Why wasn't this (better) format adopted?" the answer is: * It's not actually better. * It's patented/requires license/is owned by someone who wants a lot of royalties. JPEG2000 is of the second variety.