> but is it possible this plane is sitting somewhere, intact
No. Somebody would have seen it. And talked. And taken a picture.
Right you are. MH70 is a perfect example.
I agree with mbarker12474. IF it was sitting somewhere, we’d have a picture, video, or something. Sort of why I don’t believe in non-earth aliens, with the proliferation of HD cell phone cameras, we should be able to see a good video of them, Bigfoot, Yeti, Nessie, etc., if they really existed.