I wouldn’t normally take apart an HN comment on grammar, but you are commenting on clarity of writing. If this is something you care about, than the following proofing may be useful. Format is (delete text)[insert text or comment].

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That’s because you have very (few exposition)[little exposure] to (1890 writing)[writing from 1890]. When I read published (book)[books;otherwise “often” in next segment doesn’t make sense] from a hundred years ago (in French), I’m often (stroke)[struck] by how much clearer it is than[,] say, (newspaper garbage)[awkward] (for instance)[redundant after using “than, say,”]. No[t] only in style, but also how (they)[unclear reference, refers to books but books don’t write, authors do] write to inform instead of writing to hide facts. It’s even more striking when watching archive videos from the 60’[s]. People speak more slowly, are more composed and use wider vocabulary. It might not be as (caricatural)[not a word and intended meaning unclear from context] as the movie Idiocracy portrayed it, but[,] in a way[,] I feel we’ve (slided)[slid] into what (they)[it] predict[s].