Ok here's your direct answer(s). Is titanium a neurotoxin. Yes, if that's what the science says. However, the toxicity is based supposedly on high levels. And since I don't have implants or rods and hopefully never will, I'm not particularly concerned. And since the jury's still out concerning what level actually causes damage, unlike you, I won't conjecture further. Does it need to be coated or replaced with Si3N4? I guess in YOUR opinion it does, but since nothing is happening in the real world, it would seem that no one's bothering. Perhaps, science is working on something they believe is REALLY needed since Si3N4's main purpose is to apparently stay hidden in a million patents that don't do anything (other than keep the game going). Or maybe titanium (other than in Dick Van Dyke's mouth) generally doesn't cause as much damage as you emphatically believe. Maybe just maybe, Sint's billion dollar baby is only for the select few, who gladly settle for a half million in salary along with a yearly bonus, while the CEOs play 'musical chairs'. Now that my moving on will cause the stock to go up, you should be happy. And when it doesn't? I guess someone will keep dreaming while management continues to pass 'go' and collect.
Finally, as I've said a million times....IF management was truly sincere and truly capable they would change the way they run things. But stockholders can't even get an apology (let alone a response) from these clowns and apparently YOU don't think either is needed. Enjoy!