We don't usually know that AM radio can sound pretty good because, in my opinion, once FM was the main band to listen to, manufacturers really cheapened the AM sections of tuners.

I think a similar thing has happened as regards conversion of analog SD to higher definition, or even to 480i digital. Analog looked much better when it was all analog. The real evidence of this is the romantic closeup where you see two faces close together, and the people are holding totally still but their noses are wandering around a bit. Yesterday I recorded an SD program of Guy Lombardo music just to see what it was. There was a piano solo, and the video rendition of the piano looked like a piano with the keyboard in the foreground, overlaid by small ocean waves lapping upon the keyboard. The entire damn piano was waving!