I still miss the UI for NeXTSTEP. The joy of tear-off menus floating near my windows is missed. I still have the discs and the full set of books in storage along with the complete run of NeXTWorld magazine[1]. I also miss the librarian. A lot of NeXTSTEP didn't make the transition.

Watch Steve Jobs videos from 1996 and you get some interesting insights.

1) now available online https://archive.org/search.php?query=nextworld