How much long do you think paper / hard copy will still be a thing or even mainstream?

Using paper, printing paper. Paper documents. Hell, mail even. 📬 ✉️📄

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How much *longer - I remember in 2013 they were saying in uni "paper will still be with us for some time ahead," - despite even then the rise of smartphones and tablets
How much long do you think paper / hard copy will still be a thing or even mainstream?
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