[Santosh83]

Gravitational collapse overwhelms fusion pressure much before the black hole stage is reached, i.e., neutron stars. Also general relativity seems to indicate unambiguously that the in-falling matter collapses to a singularity, which obviously cannot have any kind of structure or process inside it. I guess only a quantum theory of gravity can clear up this enigma.

[qubex]

(Not to mention that once one has crossed the Schartzchild Radius time dilation becomes infinite from the perspective of the outer universe, and time freezes, so any process becomes frozen in its tracks, at least from the perspective of external observers.)

[etskinner]

Why does the perspective of outside observers matter at that point? Aren't we talking about what happens inside?

[Santosh83]

True, for the in-falling person, the outside observer's perspective doesn't matter and vice versa. But what happens inside is, (and probably will always be), entirely theoretical, but we can observe the space just outside the event horizon.

[AnimalMuppet]

What happens in the Swartzchild Radius, stays in the Swartzchild Radius.

[BenMorganIO]

Yes, but that process is never truly reached since time has to slow down infinitely for that to happen.

[InclinedPlane]

This is untrue, gravitational collapse does not overwhelm fusion pressure, fusion stops, that's why neutron stars are created.