This seems to be a common misconception because of the way the property is named. What we’re referring to is the maximum speed of information through the fabri

This seems to be a common misconception because of the way the property is named. What we’re referring to is the maximum speed of information through the fabric of space time. Light (photons) travel at that speed when unimpeded, as do neutrinos, gravity waves, magnetic effects and anything on the electro magnetic spectrum. ‘Slowing’ down light by putting it in a reflective cylinder, water or fiber optic cable doesn’t change the nature of the universe or help achieve faster than light information exchange - it just means some photons are experiencing a traffic jam.