Hello All,
I want to thank Abhas Mitra for his active participation, and others for their continued interest in this subject. But I'd also like to stir the pot a bit, to keep things interesting. There is some complacency I think, even among the experts in the fields that most pertain, in assuming such expertise allows us to trivialize or dismiss various concerns about BHCs - even when doing so is highly erroneous.
The reason is that to study these objects well requires expertise that is unusually deep and broad - so that most researchers are unwilling to study the half-dozen or more unfamiliar topics that are absolutely necessary for a proper treatment, beyond their core disciplines. And that is partly why the scientific community looks to multi-disciplinary experts like Stephen Hawking to pass judgment, or provide needed insight, for additional progress to be made.
Now what is most urgently needed is to forge an understanding of how to better merge the Quantum and Classical pictures, in order to make our understanding whole. Instead of asserting that Quantum trumps Classical or classical (plus non-linear) subsumes and trumps Quantum reality, we should be looking for a deeper understanding that encompasses both. That is how deep I think the real Physics goes, to adequately describe the objects which have been called Black Holes - sometimes Black Hole Candidates or BHCs - that are probably some flavor of Eternally Collapsing Object or ECO.
I think that Christian Corda and his recent colleagues are on the correct track, to assert that a semi-Classical approximation of what we observe should be possible and should reveal the nature of Quantum Gravity that is at work in our universe. So as I said above; it's not one or the other, but rather that the Quantum and Classical pictures are convergent. In my opinion, this is an important point.
All the Best,
Jonathan