With a few exceptions (e.g., remote mines activated with omega watch in GE and TND) gadgets are always different in each film. Why? If an exploding pen and laser watch did well in one mission, why not make it standard issue going forward? By Die Anohter Day, Brosnan Bond should have laser/remote mine watch, exploding pen, x-ray specs, along with his DAD gadgets.
Ditto for Craig - shouldnt he also have the radio in his shoe and the thumb-print gun in Spectre? Shouldn’t Dalton have the keyring that explodes with gas when you whistle in LTK? Moore and to a lesser extent Connery should be flush with gadgets by their final films.
You could argue that they’re all prototypes that never actually work or are too expensive to make more of. But I don’t actually buy that. They clearly work in their initial missions, so why not use them again?