We'll soon have FOSS adapters on top of LLM:s or similar software capable of managing and to some degree extend botnets. It's likely something like this will leak from a state actor during the coming years too.
My personal concerns are more that we are going to see the botnets get smarter and smarter and more automated.
Just imagine if every script kiddie running a "dumb" botnet suddenly got 2x more effective.
He was referring to both managing and expanding. The latter I might see an argument for. The former? I do not.