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.
“Some people put up a peace sign with one hand. Some people put up the middle finger instead. I use two hands and put up both.”
“Will he get a place for his oldest boy? He can not. His girl? Why, the Chinaman is in her place too!”