I kinda hope that one stays around for a long time, because robots controlled by AI competent enough to guide those robots through every step in their production from mining raw materials to end-of-assemble acceptance testing, is one where tiny mistakes kill everyone.
Like, say you've got a sticky 0 key and accidentally ask for more burgers than there is carbon in Earth's biosphere and atmosphere combined: if the sufficiently-competent AI is a little too eager to obey and not quite willing enough to say "no" or listen when told to "stop", that's enough to kill everyone.
Abou sycophancy, I sense that it's much lower now with Opus 5.5. Yesterday I had to argue my viewpoint for quite a bit before it relented, on an issue I'm pretty sure I'm broadly correct. It's becoming a better sparring partner that actually pushes back and raises counter-arguments.
To a first approximation, none of them.
There's a huge difference between "zero" and "a little" when it comes to Amdahl's Law and scaling up, let alone the things where it won't be "a little". Which is one of those things that sounds obvious when I say it. But clearly a lot of people are predicting a future that is based on costs and times being "zero" that won't be.