See Michael Krigsman about 5 ways tp prevent IT failure.
The 5th way:
"Scope creep. Lack of preparation typically begets the kitchen-sink syndrome, where project leaders add in every kind of feature and the kitchen sink to boot."
Maybe sometimes you want some scope creep:
Working in a IT project is exciting.
But who likes roll-outs? Annoying customer calls and the boring maintenance phase starts.
Why don't postpone this to the infinity?