The densities and pressures in the core of the core are so high that they may also contain totally exotic states of matter. Bose-Einstein condensates made of strange matter. There seems to be an upper limit to Neutron Star masses as well. Anything with more than 2 solar masses can not be supported by neutron degeneracy pressure. If the core of a massive star has more than 2 solar masses no none force can stop its collapse.
Gravity wins finally and forever.
The star collapses all the way. Neutron Stars in Rotation. The pulses with astonishing regularity. Pulses From Neutron Star - Pulsars emit periodic bursts of radiation. This recording shows the regular change in the intensity of the radio radiation emitted by the first such object known.