Twenty years after The Singularity Is Near, some of the rebuttal chapters aged worse than the forecasts. The microtubule critics, the input-latency critics, and the reversible-computing skeptics all have new data.
Kurzweil listed exotic computing substrates in 2005 as heirs to silicon. Twenty-one years on, silicon won by getting weirder — and his lone forward bet, that quantum stays special-purpose, has aged best of all.