We have Spectrum and are getting 600mps d/l and 25mps upload. For me that’s plenty fast. Don’t have Apple TV anymore for the same reason as Erik, but do have Amazon Prime. I can’t really tell anymore about picture quality because my TV is nearing ten years old and wasn’t the top of the line when I bought it.
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.