This philosophy would suggest, during normal landing on long dry runways, with the desired turnoff point a considerable distance from the touchdown point, autobrakes need not be used".
Boeing advice is frequently disregarded by operators who cite their own reasons. Often opinions change after chief pilots leave and a new broom comes in and re-invents the wheel.
Idle reverse after touch down makes little difference in the landing roll with the brakes only getting hotter for the next take off. That might be fine for carbon brakes that work more efficiently when hot. But not for others. If for some reason the pilot suddenly decides to apply full reverse from idle during the landing run, by then the speed is usually relatively slow.
The end of the runway may be coming up faster than he thought and he needs the reverse urgently. By then it is too late since it takes considerable time to spool up from idle reverse to full reverse. Reverse is ineffective at low speeds and full reverse at low speeds runs the risk of compressor stall and engine damage. .
idle reverse isnt a big issue. I reckon it gives the punters a better landing...more a psychological thing more than anything else,
Best of luck with the lawyers on that one..