Utility is a function of the user as well as the tool. I use a chronograph many times a day to time the duration of tasks (phone calls, reviewing documents, writing reports, etc.) for billing purposes. There's no other complication that would be as useful to me, so I collect primarily chronographs and enjoy wearing a different one every day in rotation.
The next time you hire a lawyer or consultant who bills you by the hour, you might want to notice whether that complication is on his wrist and, if not, consider whether he bills you by guesswork.
Park