Who needs wire? I’m going to use troughs of mercury for all signal connections!
Some one tried that already. His name was Faraday. He found a complex rotation in 3 axis. It’s in a conductive fluid, but not in a solid conductor. The signal is still trying to do so when it deals with a solidus conductor, and situation is a major component of the origins of the thing called 'skin effect'.
Which they don’t bother to tell you, so it is generally misunderstood.
Electrical calculation formulas-- are not the underlying physics.