I was curious to note Stephen's assertion in Is there a way to list packages from date when they entered Debian archive? that:
In Debian 9, aptitude allows finer-grained purging of the new packages list, which helps make it manageable and useful.
Could somebody elaborate on this? I did look at the updated manpage of aptitude and while it has much more content than before, couldn't find what Stephen shared the other day. If possible, please somebody share with example/s to see how the new aptitude works with respect to new package lists.