Well the em dash remains difficult to type on a normal keyboard, this is a major reason why I don't use it, and why I think it will never get widespread adoption
Something about people successful with computers makes them quick to claim something is easy based on the number of steps needed, without regard to the ease of remembering all the arbitrary or sometimes contra-pattern steps required.
In my defense, I remember it because I expect Option key to modify the original character and Shift key to make it bigger, so remembering that Option plus Shift makes hyphen into a bigger alternate version of it, i.e. the em dash, is not difficult. I acknowledge that not everyone would see it this way.
