[shiroiushi]

1. I don't have to pay a monthly fee

1a. I don't have to listen to annoying and offensive ads

2. I don't have to worry about something disappearing

3. I can listen to the version I want (remaster vs. original)

4. I can listen to music in the codec of my choice: <320kbps MP3 sounds bad, and some people prefer FLAC, for instance

5. I don't need an expensive cellular plan to handle all that bandwidth

6. I can listen to my music on airplanes

It's amazing this stuff is so hard to understand for people these days.