I remember there were so many vendors and so many types (and god, Type IV / Metal were really expensive!). Now I do really wonder if they really made any subst

I remember there were so many vendors and so many types (and god, Type IV / Metal were really expensive!). Now I do really wonder if they really made any substantial difference, at least when played on the average consumer hi-fi stereo system (or even boomboxes!) of the times. Also, consider how valuable it would have been just this kind of testing/data then: https://audiochrome.blogspot.com/2020/12/index-to-cassette-tape-measurements.html https://audiochrome.blogspot.com/2020/12/index-to-cassette-t... That's one good example of the "Market for Lemons" theory.