Shows that even with 100 cameras, 8 field officials and 100,000 spectators the "40 Second clock" fetish, is NOT perfect. Continuing to rely on the ability of a competent Referee's flexibility to control and manage clock stoppages, which often include unique circumstances (confusion, explanations, etc.) ESPECIALLY at the Interscholastic level has served "the game" well for 100+ years allowing the actual action on the field to dictate clock management rather than an arbitrary time interval.
No two football plays, much less entire games, have ever been exactly the same. If increased focus on reducing "dead time" is the objective, greater attention, scrutiny and consistent enforcement of dead ball time management, by game field officials, seems a much more prudent, game specific (and cost effective) manner to regulate consistency (of the actual game being played).
When something isn't really broke, excessive tinkering rarely produces actual improvement.