"The hard part is figuring out the fewest features that could accomplish your goals."

[pius]

http://startuplessonslearned.blogspot.com/2008/10/when-not-to-listen-to-your-users-when.html

[pius]

The actual quotation is "The hard part is to figure out the fewest possible features that could possibly accomplish your company's goals."

[jraines → pius]

In that case this is even more true: the hardest part is convincing people that they don't need the ones you left out.