"Fallows is suggesting it's aero issue, atleast that's what I got out of the article" is verified by most of the other teams perspective that its this causing a root problem.
Specific in that they all seem to agree, that there's need to get as close to porpoiseing, without stepping over that threshold, as that's where the most productive load is available.
Aero instability, in that area, ultimately makes an uncontrollable platform. Skewing the suspension design in attempt to control that region of uncertainty ultimately takes the whole ensemble down a rabbit hole. Eventually, "they can't see their arse from their elbow" to put it colloquially MB is equally lost, and difficult to separate in observable analysis as they do share significant architecture in design, also some level of facility for infrastructure.
It's this that RB and Ferrari first figured out in 2022, plus McL now. All have moved away from optimum at some points, but now appear to be converging. AMR had that successful period but lost the thread in chasing more load it appears.