Marc,
A high quality essay, giving me at least a fresh view on how we're 'wandering around' a fundamental solution. On the question 'Do I agree with 'co-emergence'? I like QBism so half agree, but 'unreal' abstract structure I reject outright. I was disappointed that as a top 3 neighbour you didn't comment on my last essay on that subject. To save an essay here you'll find an alternative 'real structure' described in mine this year, with real 'participatory realism! (Bohr and von Neuman ALSO stressed the meter/observer role). I'd greatly value your views. We do have language (history and cosmology) in common. On history; wasn't it 'Isaac' that means 'laugh', and him who moved to the Philistine lands? Is that a wise acronym?! - but he did last 180 years!
On 'strange loops' I agree that as a basis of 'quantum' intelligence if not QM. Does not the ability to set up neural 'feedback loops' surely define the 'consciousness' topics? One we can use information stored to 'imagine' scenario's and trigger biochemical release and motor neurone responses which then inform further scenario's, do learning and decisions on choices or 'aims' then not emerge of necessity? Is that not a better application of a loop than loopy 'backward causality'? answering; "The problem of free will and effective intention".?
I did like the; "infinite number of deluded observers, and an infinite number of non-deluded ones" similar to an earlier essay of mine, however I haven't yet located many of the latter so hope you may point me to some!?
Do you not think that the problem of a "rock-bottom" foundation is really that in our present evolutionary state we won't recognise it when we see it? In other words; we haven't recognised it in front of our eyes?
Finally, to pick just one (No4) from your chart; "How does the quantum wave-function "transition" to the observed classical world?" Is 'the wave-function' not just an unreal assumption? You wrote yourself it's an abstraction of reality. If we ask; "How does the observed classical world produce QM's predictions from exchanges of momentum on interactions" Might not the answer suddenly emerge from the mists were wandering in? Do you not think we may be fighting to get round the trees in the search for the wood?
Anyway. Great essay and food for thought on current doctrine(s) and 'reports from expeditions' into the dark (& misty!) Ly-a forest.
Very Best
Peter