Yes, some people can eventually go back to eating gluten without symptoms or damage even if they are celiac. This is well known in the medical community, and has been written up in multiple articles. Mass denial of the possibility of recovery from celiac, however slim, on this board is unfortunate.
Gluten intolerance cam come and go too, depending on gut health. There is growing evidence that food intolerances and autoimmunity are a result of dysbiosis and leaky gut. Heal the gut and establish normal bacterial flora, and the food intolerances improve or disappear because food stays on the correct side of the intestinal wall and outo f the bloodstream where it causes trouble. This is the reason Alvine is working on a zonulin blocker drug.
I dug up some info on celiac remission for someone else on the board in this thread.
How many of those people, who return to eating gluten and don't have gut symptoms, remain free of other autoimmune diseases for the rest of their lives?? Freedom from gut symptoms ('classic' celiac symptoms) doesn't necessarily mean freedom from damage from gluten antibodies in other parts of the body.