Well, now, on the player if you want to skip 10 songs real quick using the right button,
you get stuck waiting for the disk(s) to spin up.
With 256 MB of RAM, you could have the next 60 songs (or so)
of the current songlist buffered into RAM.
That would be nice.
It could also be smart enough to keep the last 10 songs you heard in RAM in case you want to rewind a few songs and hear that one.
I know this is a mundane use for all the work involved in replacing (adding) the RAM,
but it serves as one useful thing you could do with all that RAM.