What does it even expand into like in terms of displacing the presumably “Nothing” that previously existed or didnt exist when the universe expanded and should have displaced or subsumed it?
What does it even expand into like in terms of displacing the presumably “Nothing” that previously existed or didnt exist when the universe expanded and should have displaced or subsumed it?
Yes exactly. What you’re describing is cardinality. For example the number of natural numbers (counting numbers) is a smaller infinity than the number of real numbers (rational numbers + irrational numbers).
This can be proven rigorously.