[JabavuAdams]

The first couple of paragraphs are a great summary. Prof. Binney has some interesting observations on the non-physicality of quantum measurement (the formalism).

One of the postulates of QM is that after a measurement the system is in a well-defined state (the one we measured). But this is aphysical.

It's an artifact of the deliberate choice to formally model measurement in a way that simultaneously recognizes that all measurements disturb the measured system, while also wanting to abstract away the particular hardware used.

So, I'm starting to see wavefunction collapse and the whole Copenhagen interpretation as artifacts of the the formalism, not any kind of physical truth.