That's true! I know that, it's the reason why every OS has its own well known style of emoji. The fonts people use day-to-day don't cover the emoji characters s

That's true! I know that, it's the reason why every OS has its own well known style of emoji. The fonts people use day-to-day don't cover the emoji characters so it falls back to whatever massive default font is installed. Just thinking that wall is getting higher every time they add new emoji or new ZWJ sequences that exponentially grow the number of glyphs. Even the base emoji set (should you want to make your own emoji-only font) is bigger than many single-character set fonts. (But not all, clearly)