One big roadblock for environments hoping to improve on the book with fancy interactive elements: they all require reading on a screen! And reading on a screen is almost universally terrible!
I've been getting increasingly worried about this—seems like a serious threat! (con't)
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Where would you put simulations? AR, for example, as a layer on top of your daily experience in helping you learn? I often wonder how good something like this could be for Sales discovery calls, for example.
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Even more problems to solve in that space, and they're even harder, I suspect. But some notes on that direction here:

