It could be said that the Ares system just happened.   Instead of being developed with either venture capital or corporate funds there is no one person or group in charge for the government to go after when there is the perception of an illegal activity.  People can join and each computer becomes it’s own individual entity.   With the click of a mouse you can have access to over 100 million titles.   Can you even imagine how long it would take you to download and listen to each one.  Once you have joined and started the sharing process you do not have to worry about the system being closed down.