How about correct everything inside these parenthesis/brackets? Or indent everything within these brackets? Or do a search/replace over only the next paragraph? Or Title Case everything up to the next colon/semicolon/quote? Read the contents of file <x> into my current buffer? Format everything within these two matching quotes?

Every movement is composable with every action. There's a lot of movements, and a lot of actions. Delete three lines is the simplest possible command, but it's hardly the only one.