What's the avg spacing on atoms in a silicon matrix anyway? Something on the order of 0.2nm (2A)? So are we now nearing a point where 1 extra atom is 10% error in a single dimension? Would be grateful if someone who actually understands this stuff would care to illuminate my speculation further?
2nm is a commercial name that doesn't have much to do with actual nanometers. The actual distance between transistors (gate pitch) in the 2nm process is expected to be 45nm.