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.
“When you are skinning your customers, you should leave some skin on to heal, so that you can skin them again.”
“When, at the end of the 1960s, I became interested in the Nazi era, it was a taboo subject in Germany. No one spoke about it anymore, no more in my house than anywhere else.”