alt Hacker NewsI don't want to get too deep into this because it doesn't matter to my point (you're also not entitled to eat truffled dishes any more than you're entitled to eat ortolans). But: set a document in one text face or another; it won't much matter at all to the experience of reading it (unless you pick a bad text face). Leave the truffle out of a risotto and you've made a different dish.
The important subtext of this thread is that, when we're talking about functional typesetting, the solutions space is pretty constrained. There aren't that many things you can do with a text face (vs. a display face). And you already have available to you extremely high-quality, well-hinted text faces at a full range of weights.
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Take any famous wordmark and replace it with a different typeface. You have a different wordmark. Typefaces aren't only used in body text. If you've read Bringhurst and are a typeface nerd, you should know you're arguing in bad faith. (Also generally like your comments, fyi, but you should know not to chime in that way about that topic on HN where the average attitude to anything design related is a mix of contempt and ignorance).
While we're on this subject, which extremely high-quality, well-hinted text faces that are freely available would you personally recommend to web and app designers?