Rev 9:6
And in those days shall men seek death, and shall not find it; and shall desire to die, and death shall flee from them.
Hebrews 9:27 - And as it is appointed unto men once to die, but after this the judgment:
That verse has always puzzled me. Unless it refers to after His Coming and our mortal bodies are gone and left with only the spiritual one. In which case the damned awaiting the long line for their Judgment wish they were dead rather than face God for their lifetime of unforgiven sins.
Remember, Revelation 9 makes it clear that God’s chosen or those listed in the book of life will be protected. So chances are these “nano-bots” are something that would not affect those of God.