The cost of adding a feature isn't just the time it takes to code it. The cost also includes the addition of an obstacle to future expansion. The trick is to pick the features that don't fight each other.
“Sometimes when I hear my voice on tape, I'm like, 'Who is that horrible man?'”
“The one thing that you simply have to remember all the time that you are there, is that Hollywood is an oriental city. As long as you do that you might survive. If you try to equate it with anything else you'll perish.”