Low-fidelity vs. high-fidelity, can mean different things depending on area of interest. 90% or more of the people using lo-fi, or asmr for music on YouTube have not idea what it is, and use it to get a click.  Lo-fi design is a way to translate high-level design concepts into simple designs, without loosing their intent. Lo-fi in music is leaving in imperfections, or making them intentionally. That however isn't the same thing as just adding a filter for nostalgia sake. lol, anyway rant over.