The Universe MUST be Steady State. It can not be anything else or it would not exist.
To clarify, Steady State wouldn't only include the present period which is assumed to be stable but also all origination processes. The Big Bang is miraculous. We're looking for something that is an extension of normality, so to speak.
Everything we observe is of a Universe that has been changing in density and composition for 13.8 billion years. Anything outside of that is also outside of science (at present at least).
You can't observe the Big Bang.
Case concluded.
The "Case of the BB" may have well died, but not the General Principle of Reasoning. The GPR .
The GPR stipulates that using scientific observation and measurement,
Events of the past can be traced all the way back to - ORIGIN
Since the events leading up to Origin are claimed to be well known and understood, the final Conclusion is often readily made. There is no need for actual observation of Origin - it can be logically deduced and if mathematics is your fancy proofs abound. So say the sorcerers and soothsayers.
OP needs to boot the minors.
Well at least, I provided some information in the initial pages of the forum. Then, you all diverged from rationality...