In such circumstances, some argue it would be time for Charles to consider an extraordinary step: abdication in favour of Prince William.
Spain offers a recent precedent. King Felipe VI ascended the throne while his father, King Juan Carlos, was still alive. In another sphere, Pope Benedict XVI stepped down after concluding he was not the man to guide the Catholic Church through mounting crises, making way for Pope Francis — a leader seen as better equipped for reform.
Pope Benedict recognised that the Church had failed abuse victims and attempted to address those failures. Ultimately, he determined that new leadership was required. There was no time to lose.
If any missteps by Elizabeth or Charles were to pose an existential threat to the monarchy, some believe a similar calculation would be necessary.

Step Aside for the Future?
The argument is stark: if the institution itself were in jeopardy, wisdom might lie in stepping aside, allowing Prince William to assume the mantle and usher in a new era.
Such a move would be unprecedented in modern British history, but not inconceivable. In that scenario, Charles could retreat from public duty, spending his remaining years with Queen Camilla at Highgrove, while a younger generation reshapes the monarchy for the future.
For now, this remains speculation. But in a moment of uncertainty and mounting scrutiny, even the unthinkable no longer feels entirely impossible.