Use a Mac or iphone? The opt-dash key combo has mapped to em-dash for a long time, and I think you can now just long press the dash key too. The opt key doesn’t scale beyond the hundred or so extra characters it gives space to live on the keyboard, but it sure is a lot better than memorizing Unicode code points, and the rest I can get from the Fn (or Fn-E), which activates a Unicode search panel just about everywhere. I don’t know which Linux toolkits do something similar, and Windows Character Map seems to be somehow even worse than I remember from several decades ago.
