Would love a feature so I can easily tell what content is the same between my libraries and a friended Plex user’s libraries. This would allow me to see at a glance, for example, what titles they have that I do not.
An easy way to implement this feature would be to allow the data to be used in Smart Collections.
For example…
Advanced Filters:
Match all of the following:
Title: is not in Library: Movies
Title: is in Library: Movies, John Smith
…would show a collection of movie titles that my Plex friend John Smith has that I do not.
This would be very powerful, enabling creative lookups, for example, that show all the Meryl Streep content we both have, or a comparison of 4K content.