> The main question I have is when is enough, enough?

It's doesn't matter whether enough is enough. If we don't have effective power structures that let humanity take large coordinated action that in accordance with the will of the masses, then nothing will be done.

In the past 20-30 years, those power structures have been eroding significantly and much of the large scale action humanity does today is in service of a small number of elites. If AI horror shows are not a problem for them, then it won't be solved. (The flip side is that if somehow AI becomes a problem for Musk/Trump/Bezos/etc. you can be damn sure something will be done at that point.)