When I got my new Rega amp, I connected up my old Technics RS-BX501 cassette deck to check it still worked. I tried some old cassettes that I had recorded years ago and they sounded just ok. But when I made a fresh recording using my new equipment I was amazed at the sound quality, most agreeable. I don't use the deck, though I still have chrome and metal tapes to use. However if my car had a cassette player built-in from new, then I probably would use it.
As far as I can see, nobody is manufacturing quality tapes at the moment, only ferric oxide, so I can only assume that those pre-recorded cassette releases will be lacking a bit of sound quality.