the thing imploded, likely due to the carbon fibre pressure hull. it was supposed to go visit the wreck of the titanic so it should have been able to right down to the sea floor safely, and the wreckage was found some distance away from the titanic so it didn't pop because it crashed into it. also there's nothing really wrong with game controllers as controllers of anything really. they are designed for abuse getting sat/stood on and thrown around still usually be functional after. if it's some sort of safety concern that sort of bomb proof construction and reliability are what you would be looking for in whatever it is you use.
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