Not mentioned in the article, but an interesting point of difficulty in editors is the character transposition command (Ctrl-T on most MacOS applications, stemming from emacs I imagine):
TextEdit and VSCode are the only editors I know of to handle transposing emoji in a reasonable way. VSCode will separate the emoji from the color modifier. TextEdit keeps them together, other editors I know of corrupt the data by slicing surrogate pairs or just no-op the command.
Wait, there are people who use the ctrl-T command? That thing is the bane of my existence because I have muscle-memory for "new tab" in firefox but when I do it in a text editor for "new file" out of habit it just jumbles text.
TextEdit and VSCode are the only editors I know of to handle transposing emoji in a reasonable way. VSCode will separate the emoji from the color modifier. TextEdit keeps them together, other editors I know of corrupt the data by slicing surrogate pairs or just no-op the command.