texbychoice - underrated comment. You're so correct about the quality of Toslink as a quality connection.
Recently, I decided to invert my system so the optical no longer handles TV audio but goes from a WiiM Pro. Had not tried it but thought there could be some improvement with noise. Yes, indeed.
Since my RME ADI-2 DAC was fed Toslink, the noise floor dropped significantly adding to the separation, depth, and soundstage in one fell swoop. Off to TV audio went the coax with its relatively nice new cable.
Running Verizon fiber via ethernet to a nifty inexpensive fiber optical solution to the WiiM Pro also helps with RF noise reduction. Combined it's taken my system to a significant performance. My tube amp monoblocks are very sensitive and produce great sound so they just ate it up.