You're listing the specs for LaserDisc as if they were always the same. The 70's discs all had analog stereo audio (although many movies of the time were mono.) In the early 80's they added the digital audio tracks, but the analog FM tracks were also still present for backwards compatibility with older players that couldn't decode the digital PCM tracks. Most players capable of decoding the digital audio could output Dolby 2.0 Stereo and also had CD playback. In the 90's they added a 5.1 AC-3 track using one of the analog tracks, leaving a mono analog track for backwards compatibility. (By that point very few original analog players were still around.) You needed a player with the AC-3 RF output and a compatible receiver or decoder box to actually make use of the AC-3 track.
All LaserDiscs have a composite analog video signal encoded on them, however some were recorded frame by frame (CAV) and others in a stream (CLV). You could fit more content on the CLV discs, so it was more common, but it could not do trick-play like freeze and slo-mo, at least in the early players.
I still own all of my original LaserDisc equipment, covering all of these advances. Of course, the only thing I use it for is to watch old copies of un-ruined Star Wars movies and a couple of other titles that have never made it to DVD.
