Quite correct - use of reverse thrust reduces the amount of wheel braking required for a given rate of retardation. This has 2 major advantages; firstly, brake wear is reduced considerably - brake parts are expensive whereas rev thrust is virtually 'free'. Secondly, and very important for low cost carriers on short turn-rounds, use of rev thrust reduces brake cooling time. This means that the length of the turn-round does not have to be extended whilst waiting for the brakes to cool sufficiently for the crew to get airborne again confident in the knowledge that they could provide 100% efficiency should they be needed to stop the aircraft in the event of a rejected take off.
tg
737 Driver