Due to living longer there might be plans to create 11th Dan. What's your view about it? My opinion below. Reaching age of seventy you really care or be bother wearing 10th or 11th Dan? Spending most of your life training being respected and awarded highest grade you should care less about belts.
More I train and mature less interest I have in belts, certificates and awards. I enjoy training , teaching and travelling that comes with being respected and recognised as a valued member of martial art tribe.