When it comes to games like GH and RB, they can stand to make a transition since there is a much higher emphasis on visual style and appeal. When was the last time you played IIDX and watched the video anytime other than when you have a free measure or you put it on auto play? Exactly.
Konami doesn't need to make any switches right now since that would alienate a majority of their userbase.
Other than more space per disk (and no, you still couldn't fit the IIDX14 HDD on one disk.) there are no real draws to making your userbase rebuy everything and upgrade, Sony brand official adapter or not.
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