I remember being disappointed in some early CDs made from
analogue masters where they added a steep fade at the end
of each track to try and prevent the tape hiss being apparent.

Let's not forget the CDs that just plain sounded bad.

When a late friend visited in 2001, he brought along a remastering of a
Horowitz album -- which I happened to have the earlier version of). The
latter simply didn't sound very good -- it was hashy. The newer version
sounded like a different performance altogether!