> If it should depends on the use case.  It should be able to do so when
> the user wants that - especially pretty printing (pp).  So far this has
> been discussed here and there, but so far nobody has implemented it.


Long lists as output is pretty hard to read when the list is on a
single line and it is displayed on multiple screen lines.

So those parts of emacs which print lists for human consumption
(debug, printing expressions resulting in long lists, etc.) should
benefit from some heuristics to display the list as one item per line
when it's better.

E.g. if the disaplayed list is longer than a screen line then it could
display an item per line. Maybe depending on a user option.