I think with turntables active messes with this feedback loop that is responsibly for the ultimate sound character we hear with a particular TT design. I can’t say for sure this follows to tape or not and have no experience with digital and active isolation. I think power amps (perhaps) or components with separate power supplies will benefit the most. Again, this is my working theory.
Optics are rather clear cut...Sharp or Not...that is what these were designed for. Sound is more complex, subjective. Sharp or not doesn’t do the sound medium justice when trying to describe it.