If Nintendo did that from the start then they wouldn't be in a such a state and maybe they wouldn't be a laughable pathetic company with an ignoramus named Iwata running it at full speed into obsoleteness.
The perception of obsoleteness shapes the upcoming gaming outlook as the Wii and PSP are scrutinized as the «new» Wii U and PlayStation Vita release soon.
Additionally, one of the requirements from the IDPF was that EPUB 2 files still work on any device that uses EPUB 3, voiding any fears of obsoleteness and erasing participants» concerns about needing to reformt EPUB 2 files to the new version.