Atom throughput
From Wise Nano
So you can build something out of single atoms. But devices usable by humans consist of so many atoms, won´t it take forever to build something useful? And if you do it fast, won´t the machine fry itself?
Short answer
Massive parallelism provides the necessary assembly speed. At worst, you could assemble atoms into components slow enough to not "fry" them, and after they cool, assemble those into larger components or products.
