The "huge" storage capacities we see are additional for some kb models and
became standard on some or most of the top models.
As we see that we can store lyrics, scores, mp3 etc. to use when play, this
is important. More soundsamples and use of the sequencer increase the need
of more storage I guess.
Also the prices for HD's and other storage mediums are as low that this did
not increase the price of the keybard very much as we could see earlier on.

Myself I really love to have all needed stuff onboard without have a load of
diskettes floating around, and hopefully the next thing they make huge is a
screen like we have on the laptops, 17" or 19" colour widescreen to fold up
when use the keyboard.

GJ