Stability issues are beyond the network being electrical and correspond to the electromechanical dynamics of the grid.
These types of analogies are very sound and well studied [1].
Great power engineering books, such as Olle Elgerd's Electric Energy System Theory, make extensive use of these.
https://en.wikipedia.org/wiki/Mechanical–electrical_analogie...
There's also the fact that transmission of energy by fluid in a pipe (sound wave speed I think) isn't anywhere near as fast as transmission of energy in a wire by electric fields, even though the electrons themselves aren't really moving that fast at all in bulk (*drift velocity is low). There's a 'pipe full of marbles' analogy for that effect, but the actual energy is carried by the electric field, not by a flow of electrons as with a flow of water through a water turbine. There's also the Drude model which treats the electrons as something like an ideal gas with electrons scattering off the positive metal ions:
https://en.wikipedia.org/wiki/Drude_model
However if you get into band theory of solids as a means of explaining conductors, insulators and semiconductors, anything related to a water pipe analogy falls apart:
Asked a different way, what didn't work for the purposes of this article? It's at a high enough level that "becomes an impediment" isn't really an issue. Nor are "p-n silicon junctions". Nor the speed of transmission.
photochemsyn speaks about how the hydraulic phenomena is not adequate to describe some electronic aspects (e.g., modeling p-n silicon junctions). These issues are irrelevant to how well the hydraulic analogy works to describe the workings of the AC transmission grid.
That it doesn't work in all possible cases talking about A/C transmission doesn't really impact its use as an analogy in a high-level view of the grid.
The hydraulic analogy easily extends here - just imagine water flowing back and forth.
This is well studied [1] and power engineering books make use of this analogy.