Not OP.
Why would it be millions in 50 years?
The think about nuclear weapons. In the early days, it was limited to the super powers. Now 9 countries have them and a country like Iran is capable of acquiring them.
Is destructive AI be any different?
Genuine question.
Presumably, if we solve alignment/mech-interp, then the first ever RSI-AI will give us the keys to solve destructive-AI trained on 1million dollars 50 years from now.
BTW I really, really hate discussing what happens post-singularity. Everything's made up and no one knows wtf will happen so again, this is just nerdfantasy.