Kurzweil bet the 2020s on Drexler-style diamondoid assemblers. The bloodstream got programmable nanostructures anyway — built from DNA, not diamond.
Every 2004 nanotech demo Kurzweil cited as proof of molecular manufacturing’s trajectory was real. The trajectory wasn’t.
Nine of ten nanotech milestones Kurzweil cited in 2005 were real. Almost none reached a product through the mechanism he named.
Ten 2005 predictions about transistors, DNA computing, autonomic systems, battlefield networks, and cosmic compute limits — scored against 2026 reality.
Kurzweil said full molecular nanotechnology would arrive around 2025. It didn’t. But a different kind of nanorobot did — built from folded DNA and steered by magnetic fields.
Kurzweil bet the 2020s on carbon nanotubes. In mid-2024, Nantero quietly shut down. In Q4 2025, TSMC’s silicon nanosheet transistors entered volume production. The scoreboard is in.