The emojis are cute in this description of language changes, but I’m worried some programming newbies will look at this as an example of “pros” / Apple endorsing it and will start using them in real programs.
One of the many reasons you have code reviews. A formal review isn’t even necessary, since the first time anyone but the author sees the code, the ensuing ridicule will ensure that it never happens again.
OTOH, one of things hammered into me at Microsoft was “sample code becomes production code”.
