From an "all files" view, entering:
[=dblocation()]=playlist
into the search bar returns around 1600 files imported between 2003 and 2015.
895 of those, a range of audio, video and image, do not appear on any playlist.
Build 26.0.49 had this change:
4. Changed: Files from a playlist import now are imported into the main database (instead of only the playlist database).
Which I think, was related to Dr.Who usage, but I might have that all wrong.
What is the purpose of this database, and what triggers files to be added to it?