Your infinite universe is theoretical.<quoted text>
It's all theoretical or speculative and could never be reproduced, so it will forever be speculative.
But more importantly when we talk about infinity , there is nothing that shows it's impossible but belief. Something a theist has , not the scientist. The evidence says the Big bang happened.
The scientist see the evidence only.
The theist believes but believes a god caused it, the theist also tells me human were created by intelligent design, and that infinity is impossible.
None of which is supported by the evidence, but are in fact beliefs.
Remember the scientist does nor believe, only evaluates the evidence.
That's the only place you can have "infinite" - in theory.
In reality, all infinities disappear.
No computational basis for reality can exist if infinity is included.