https://www.google.com/search?q=define+erstwhile https://www.google.com/search?q=define+erstwhile https://www.google.com/search?q=define+booster https://www.go

https://www.google.com/search?q=define+erstwhile https://www.google.com/search?q=define+erstwhile https://www.google.com/search?q=define+booster https://www.google.com/search?q=define+booster /shrug If those are familiar words to you, then I think it's a little harsh to say that they "hate convincing people" because they use them. Totally agree that a good author edits out rarer words to reach a broader audience, but I think that's a very weak vector of critique for the article as a whole.