I worry little about dehyphening, but I hope the lexicographers consider combining a few of their targets rather than leaving them separate words.
The excess of the em-dash, which is not the same as a hyphen when created using a word processor, is tiring to many of us over 35 years of age, but it is as natural as, like, the use of like to mean, like, nothing. It replaces commas and serves its purpose with all the grace of the smiling emoticon. We seek the simplest and quickest way to express every pause or change in thought rather than use the subtleties of the language as it was used a century ago. I expect em-dashers to poo-poo my opinion as though I were criticizing Pollock for splattering randomly without purpose or Hemingway for 100 word run-on sentences, some with as many as 15 ands.