Yeah the OP's arguments wouldn't work: the typical answer would be "use PUA and a custom font" as Powerline symbols do (incidentally, they have been proposed to

Yeah the OP's arguments wouldn't work: the typical answer would be "use PUA and a custom font" as Powerline symbols do (incidentally, they have been proposed to Unicode [1]). But as a general emoji CPU and RAM can be actually substantially different from any other existing emoji, which is the main concern of the Unicode emoji process. [1] https://www.unicode.org/L2/L2019/19068r-powerline-syms.pdf https://www.unicode.org/L2/L2019/19068r-powerline-syms.pdf