as a user, I usually turn on a playlist to fall asleep too. This is just random TV shows I can semi watch whilst I'm falling asleep. But my playlist has a few series in it (so I'm not watching the same thing over and over) so when I come home from work the next day, and turn onthe TV, the playlist is still going, playing for 18 hours or so.
It would be nice if you could set a limit at the playlist level, that would "Stop after [x] items".
Kodi has this ability with their smart playlists (slightly different they randomly grab [x] episodes - but end result is the same).