Use as little or as much as you need. If you're into making films, tracks can add up in a hurry. Picture, dialogue, foley tracks, music score tracks, effects tracks. The bigger the project, the more you'll need. You don't think commercial movies are two tracks do you?

Sound track
https://www.youtube.com/watch?v=sfvwUBNg-X8&feature=related

Foley
https://www.youtube.com/watch?v=RKTDkr_Oeig

The big boys
https://www.youtube.com/watch?v=e4GVC4g32AA&feature=related

Soup to nuts
https://www.youtube.com/watch?v=b7ezlcH-8bs&feature=related

But if two tracks floats your boat....



Dan