What’s the current thinking on scaling? Last time I looked a couple of years back there was serious people arguing that quantum computer couldn’t scale up to useful sizes?
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*_novel_ error/noise models. Last I heard, Kalai's work remained very speculative, but very good for the field. Landauer, Unruh, and Alicki all published reasonable critiques, though I believe every comment there is now well accounted for.
Of course, if quantum mechanics fails, or certain types of very unexpected noise occur, all bets are off. The most amusing possibility: quantum mechanics fails, but quantum computing remains possible. (There are actually mildly plausible models where this happens.)
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Unfortunately, the most widely distributed critical articles are, like many of the most widely distributed praising articles, largely clickbait.
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