> the vacuum (if it is a vacuum)

Here is a five-hour video essay explaining that we actually live inside a superconductor: https://youtu.be/DkH1citHtgs

That is, the reason the weak nuclear force has limited range in our "vacuum" seems identical to the reason the electromagnetic force has limited range in an electric superconductor. Therefore we live in a weak nuclear superconductor. Whatever that means.

https://www.susanrigetti.com/math

Yep. Linked in the header. It's very good.