[II kings 9:20]

Cruise at 170 is insane, at these speeds lifting the throttle with instant feathering for "situations" such as traffic or unusual noises such as a wheel bearing letting go could be life saving.

The cruise will maintain that speed regardless of "situations" until you stomp the brake or turn it off, you may have travelled an extra 500+ feet during this time whilst the person who has lifted off the throttle is already slowing down the instant they lift versus lifting your foot off the carpet while the cruise is blasting along at 170. Not a good idea, similarly using the CC in the rain is a very poor idea.