Now we'll turn our attention to scaling the features we implement in our software. The users are the ultimate influence, and now that we have a rough idea of what's required in terms of scaling them, we can put this knowledge to work with feature development. When we think about scaling users, we're thinking about the why. Why do we choose this business model over that business model? Why do we need to enable things for one user role, and disable them for others? Once we get into actually designing and implementing the feature in JavaScript, we start thinking of the how. Not only are we concerned about correctness, but also scalability. As with users, influencers are the determinant when it comes to scalable features.