Currently, if a government ordered a special virus with Ethnicity-based targeting, a 2-year timer, and castration-effects instead deadly-effects — it wouldn’t be possible. Human engineers would push back or sabotage the effort out of moral duty. Even if they cooperated, it’s too advanced for a team of humans to actually design.
I believe that in a few years, an AI could build such a thing. Maybe it’s told to, or maybe it decides itself to do it — it doesn’t matter. The capability will be there, and it can use the existing tooling at research facilities to fabricate such a thing.
That’s one example of something that was never possible before but will be possible at a certain point of AI development (which we will arrive at soon). There are many other examples.