I recently purchased a Sonos Arc, which came with an HDMI cable.
I have a Rockefish $30 HDMI cable, “ultra high speed”, and “Dynamic HDR”. I assume that the cable included with the Arc is already optimized, and I can return the Rocketfish cable. But thought I’d check in with the community first; any benefit to using the fancy-pants cable over what Sonos included in the box?