i believe americans deliberately limited the range of PAC-3. they have THAAD for suborbital altitude. they're not canceling THAAD right?Myth? Are u sure?
The S-300 and now S-400 has the range that far exceed the patriot pac3.
I don't believe in total stealth. an object as large as B2 bomber will give some effect to it's surrounding. it's just the case of what to look. with radar absorbing/deflecting and IR suppression technology and low silhouette mean's that the conventional detection means was beaten. you just have to find something new. probably gravity disturbance(don't take it seriously) or something more exotic.