lol. no.
it's not about working there again. It's potentially working with any of the people that work or have worked there. If you give feedback and it's taken the wrong way/rubs people the wrong way this will come back to haunt you.
so, no feedback. at that point there is literally no upside.
The time for feedback is while you work there.
yes. we probably have different definitions for AGI. For me artificial means that it’s facilitated and/or accelerated by humans. You can get to the point where there are 0 biological parts and my earlier point is that there would probably be multiple iterations before this would be a possibility. If I understand you correctly you want to make this jump to “hardware” directly. Given enough time I would not dismiss any of these approaches although IMHO the latter is less likely to happen.
also, augmenting a human brain for what I’m describing does not mean that each human would get their brain augmented. It’s very possible that only a subset of humans would “evolve” this way and we would create a different subspecies. I’m not going to go into the ethics of the approach or the possibility that current humans will not like/allow this, although I think that the technology part would not be enough to make it happen.
I'm no Carmack but I do watch what is happening in the AI space somewhat closely. IMHO "brain" or intelligence cannot exist in void - you still need an interface to the real world and some would go as far as to say that consciousness is actually the sensory experience of the real world replicating your intent (ie you get the input and predict an output or you get input + perform an action to produce an output) plus the self referential nature of humans. Whatever you create is going to be limited by whatever boundaries it has. In this context I think it's far more plausible for super-intelligence to emerge and be built on human intelligence than for super-intelligence to emerge in void.
you're assuming that AGI is going to come from ML. While interesting I strongly believe that ML is not going to generate anything close to AGI ever. ML is more like our sense organs that it is to our brain. It can take care o processing some of the input we receive but I don't see it moving past that. super advanced ML + something else will probably be at the root of what could evolve into AGI.
I believe that 100 years is optimistic. I would say that it's hundreds of years away if it's going to happen at all.
My bet is that humans will go the route of enhancing themselves via hardware extensions and this symbiosis will create the next iteration(s) in our evolution. Once we get humans that are in a league of their own with regards to intelligence they will continue the cycle and create even more intelligent creatures. We may at some point decide to discard our biological bodies but it's going to be a long transition instead of a jump and the intelligent creatures that we create will have humans as a base layer.
so, no feedback. at that point there is literally no upside. The time for feedback is while you work there.