By limiting feature set, you establish a firm goal. A baseline of expectations that your user can reliably have about your product, and what unique value it will deliver for them consistently & continuously.
Without these, your user has no compelling reason to use your product, and it will dead on arrival.
So instead of maxing out features and scope, max out quality. Max out focus, and max out delivery of results. Keep your focus tight, your goals clear, and your product user-centric.
I challenge you to try this on your next great product or idea. Who does it serve? What problems does it solve, and how could you limit its scope to seven key features that really deliver the most value for your users?
Let me know how it goes in the comments!