Real Audio is convenient, but sometimes you want music in a format that can be manipulated or converted for copying to disc...etc.. if you want to give people that option, MP3 is the way to go, as RealAudio works VERY hard to be sure anything put in RA format stays there. They do NOT want it messed with.

I am given to understand that many consider MP3 to be higher quality, but that is a minore point for me...I just hope that those who have no need to 'control' song files will consider the more 'user friendly' format.