The great unwashed do not care that much. If anyone is going to "make a stand" it would need to be passengers, by voting with their backsides. No airline is going to run an advertising campaign with "Fly with us, we are fully tracked, no override, so when our nut job pilot flies you into a remote ocean, you relatives will be able to locate the wreckage" ... admittedly the running costs would be close to zero (in airplane terms) but there is no real reason to do it. Find MH370 would have been interesting to the industry to find out why the loon at the controls did what he did, but that's about all. As others have said, the technology for realtime upload of CVR data exists, that would be interesting too, but that isn't going to happen either.