To Quote HM on her 21st Birthday,
"I declare before you all that my whole life whether it be long or short shall be devoted to your service and the service of our great imperial family to which we all belong."
and the word "Abdication" is taboo I would think to HM, The Queen Mother was reported to remark when asked if the Queen would ever abdication "really, this is not the Netherlands". and Queen Wilhelmina, who led her country through World War II, abdicated at the age of 68 (despite the comment of Charles's great-grandmother, Queen Mary, that 68 was not an age to just "give up one's job". IMO HM meant what she said, she dedicated her WHOLE life and it is a life committment, and she cemented that with her coronation, and that oath is something HM would take as binding, the same as IMO as she hold the legitimate and lawful succession.
Anything else is just rag tag reporters trying to sell PUre RUBBISH