In this talk from Business of Software 2009, Joel flies in the face of what is often accepted as current wisdom and says that building new features does add value to your product. Simplicity is often a way to avoid your customers knowing you are releasing a product without enough features. Features are good if you can add them without making a product too complex. This can create real value for customers and revenue for your business. You can watch the talk or read the full transcript of this talk.

http://thebln.com/2011/11/joel-spolsky-at-business-of-software-2009-simplicity-is-a-way-of-avoiding-looking-like-you-lack-value/