None of these typographical "rules" really bother me. I'm used to using a keyboard where I only have one kind of dash that also has to work as a hyphen and a minus-sign, and where I am going to type three dots when I want ellipsis. I don't even care if opening and closing single and double quotes are the same.
I wouldn't know when to use an em-dash and when to use an en-dash, and honestly it doesn't seem like a useful thing to know or care about. Never mind that there are different standards in different places.
I've read printed books from the middle of the last century where there was a space after every opening speech mark and before every closing speech mark. It was odd, but not a deal-breaker.
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