Alan,
Very well written and a pleasure to read, again. I confess much of that came from consistent close agreement (also again) but you also nailed all the scoring criteria.
I found your starting point perfect agrees with mine; 'A foundation is wrong',, and agree NO quantum computing, entanglement, 4D space time, wormholes or mathematical solution, etc. Then 'spin' is a rotating vector field, and unification IS possible (both agreed previously).
I'm sure you'll also like mine this year, suggesting what foundation is wrong and a logical correction actually producing possible solutions!
But back to yours, I HAVE found some questions;
1. Did Einstein not just 'carelessly' loose ether in 1915, Minkowski having said "everywhere there is substance", finding it in 1921 (space without it being "unthinkable")?? I find that need NOT be contradictory, and found he agreed why in Appx.V 1952; "*bounded* spaces in motion with spaces," with boundary form & process identified.
2. Entanglement. Did AE not 'find' and object to that Bohr solution at Solvay 1927 - pre EPR?
3. QG. Do you consider the wide 'dark energy' findings inc. Casimir, Coulomb, pair production etc. reasonable experimental proof some kind of 'condensate' exists? If so I suggest it MAY be possible to test a coherent hypothesis for SUB-matter gravity (ref.vi in my essay.)
4. GR High Order Tests. A good test seems to be to give deep space probes GR trajectories & see where they go. NASA is reticent of course, but ALL go off course! (frequent 'anomalous accelerations'). No error or correction can be found so they now install on-board AI with star charts to ALL probes as real time corrections are needed. (A solution does emerge from revised foundations.)
But great essay Alan, certainly marked down for a top score. I look forward to also discussing mine.
Very best regards
Peter