Because there can only be 17×2^16 – 2048 – 66 = 1,111,998 unicode code points. https://www.johndcook.com/blog/2019/09/02/number-of-possible-unicode-characters/

Because there can only be 17×2^16 – 2048 – 66 = 1,111,998 unicode code points. https://www.johndcook.com/blog/2019/09/02/number-of-possible-unicode-characters/ https://www.johndcook.com/blog/2019/09/02/number-of-possible... Of course that limitation is artificial, due to compatibility with UTF-16 and UCS-2. So Microsoft would likely block such a proposal, since they'd have to change how Windows does character encoding.