Complicated? It's a simple little inertial switch that turns a relay to the pump off. Lots of new cars have one for safety reasons and I hope mine is never activated. If it has the potential to prevent my car from completely burning up, it's going in.
But I suppose you're still running a carburetor with a mechanical fuel pump that OEMs abandoned almost 3 decades ago in favor of a much better fuel delivery system. EFI used to be an "option", now you can't even buy a car with a carb.