1. that would only allow end user to have one set of settings per machine.

2. users often have more than one set of settings they like to use.

3. the Libray/applicationsupport/AppFolder folder is really hard for people to find - especially if they dont have much mac experience.

4. if users need to make backups of settings and application- its a lot easier if everything they need is in one place rather than scattered around a whole bunch of difficult to find folders with cryptic names.