I upgraded to a local fiber outfit and ditched my Comcast cable. Besides being much faster (especially upstream) my ping and jitter were reduced to a fraction of what they were with Xfinity.
Fiber Optic Cable
So, my provider installed fiber optic cable to my house yesterday. Not only is my TV picture much clearer, but my streaming audio is better quality as well. My modem/router goes via ethernet into my Apple TV and I use Apple Music to a WIIM Amp via optic cable into vintage floor-standing JBLs. I'm sure there are better DACs out there, but it sounds pretty good to me.
PS...I know this is an audio site, but Apple TV is fantastic.