Superintelligence and Life 3.0 seem to come up as recurring references in the discussion. I've only read synopses of both but frankly I find the argument that melevolent AI "escape" could occur without being noticed and thwarted a bit far fetched.

There's a good counterargument here[1] that seems reasonable: "One of the features of intelligence explosion that most preoccupies Bostrom and Yudkowsky is that it’s not a problem that we get to have many attempts at. In the Terminator movies, humans don’t get to approach a newly self-aware Skynet and request a do over. One minute Skynet is uncomplainingly complying with all human directives. The next, it’s nuking us. I suspect that we are likely to have plenty of opportunities for do overs in our attempts to make autonomous AIs. Autonomy is not an all-or-nothing proposition. The first machine agents are likely to be quite clumsy. They may be capable of forming goals in respect of their world but they won’t be particularly effective at implementing them. This gives us plenty of opportunity to tweak their programming as they travel the path from clumsy to sophisticated agency"

[1] https://jetpress.org/v26.1/agar.htm

How would you know if it is a good counter argument if you haven’t bothered to read the argument?

Ok - fair comment. So I found a copy of Superintelligence. The argument is pulp sci-fi at best: "The final phase begins when the AI has gained sufficient strength to obviate the need for secrecy. The AI can now directly implement its objectives on a full scale. The overt implementation phase might start with a “strike” in which the AI eliminates the human species and any automatic systems humans have created that could offer intelligent opposition to the execution of the AI’s plans. This could be achieved through the activation of some advanced weapons system that the AI has perfected using its technology research superpower and covertly deployed in the covert preparation phase. If the weapon uses self-replicating biotechnology or nano-technology, the initial stockpile needed for global coverage could be microscopic: a single replicating entity would be enough to start the process. In order to ensure a sudden and uniform effect, the initial stock of the replicator might have been deployed or allowed to diffuse worldwide at an extremely low, undetectable con-centration. At a pre-set time, nanofactories producing nerve gas or target- seeking mosquito-like robots might then burgeon forth simultaneously from every square meter of the globe (although more effective ways of killing could probably be devised by a machine with the technology research superpower)."

Look - nothing's impossible, but I agree with the counter argument that an advanced AI still starts as a "brain in a vat", with no experience of agency in the physical world. In order to successfully take over you have to assume it can develop all the physical world capability it needs, in secret and get it right first time. That seems implausible.