Presumably GP meant readers would be unlikely to understand 'Windsor' referred specifically to AMW.

I'm not sure I understand the royal system that well, but I think a journalists that refrains from acting on the change in demarcation or invents a new demarcation to go with his effective notability remaining would be acting out a bit of heresy against the royal monopoly on titles.

I meant general audiences would not understand a one-word reference to 'Windsor' (single word) as meaning 'The person FKA Prince Andrew'. Whereas 'AMW'/'Andrew Mountbatten Windsor' might. 'Windsor' until now referred to the entire UK Royal Family, various towns, the castle in Berkshire, the tie knot, etc.

I believe general audiences would understand a reference to Windsor to mean the person called Andrew Mountbatten Windsor in the previous sentence. The royal family are called the royal family most commonly. Various towns, the castle, and the tie knot were not in context.