Chip litho (practical top-down nanotech) is already approaching the practical physical limits for non-exotic computers (and practical exotic computers seem harder/farther than cold fusion).
Biology is already at the key physical limits (thermodynamic efficiency) for nanoscale robotics. It doesn’t matter what materials you use to construct nanobots, they can’t have large advantages over bio cells, because bio cells are already near optimal in terms of the primary constraints (which are thermodynamic efficiency for copying and spatially arranging bits).
Chip litho (practical top-down nanotech) is already approaching the practical physical limits for non-exotic computers (and practical exotic computers seem harder/farther than cold fusion).
Biology is already at the key physical limits (thermodynamic efficiency) for nanoscale robotics. It doesn’t matter what materials you use to construct nanobots, they can’t have large advantages over bio cells, because bio cells are already near optimal in terms of the primary constraints (which are thermodynamic efficiency for copying and spatially arranging bits).