The answer is . Early TNG episodes used "needle-drop" library music that was cheap to license for broadcast in 1987 but astronomically expensive to clear for digital streaming in 2024. Furthermore, the "exclusive" behind-the-scenes footage from the LaserDisc era often featured crew members without proper "new media" waivers.
: High-capacity uploads like the TNN Stargazing Marathon and the 1994 Viewer’s Choice Marathon preserve the way the show was curated for television audiences during its peak popularity. star trek tng internet archive exclusive