Earlier quoted context omitted.
Energy weapons are expensive to build. Chemical weapons are cheap. The War of the Machines is going to be all nerve gas, all the time. :(
Actually chemical weapons don’t do well on “cost effectiveness”, apparently: https://acoup.blog/2020/03/20/collections-why-dont-we-use-ch...
Let's say an upstart AI or group decide to wipe out humanity, or at least a country or continent. What is the time from initial detection to the realization that we as humans are at the end of the world? What do we do then? Do we nuke someone? Something? Everyone?
Any upstart taking over the world strategy is going to have to grapple with this. Chemical weapons have immediate effects. Bio-weapons will take time to spread - time during which they could be detected and possibly mitigated.
I'm sure a lot of actors have taken note of COVID-19's asymptomatic transmission. I'm sure people are thinking of bio binary weapons. Step 1) Silently infect the target population. Step 2) Flip the kill switch and they all die simultaneously.