Steady Staters have to contend with a CMB that cannot be explained using conventional integration of starlight ideas. This is why their hypotheses have gone the way of the dogs.

Many of the aspects of Goodbye Big Bang, Hello Reality have been thoroughly debunked in another thread.

One thing we CAN say for sure, though, is that we don't know whence existence. There doesn't seem to be anything a priori about matter, vacuums, and the like. Why they should be around at all is an incredible and awesome mystery that stirs humanity to the bones. There are no observational ways as of yet to get at this subject though.

All we can say is that at some point there was a bang and we don't have the foggiest (from a scientific point of view) why that bang happened, only that the why has to fall in line with current observations.