Someone pointed out earlier in this thread that playlists will do continuous autoplay and I found that to be true in the past.
However, playlists have been broken (at least on the Nvidia Shield) for over a month and won’t play more than one item. This was reported in the following link:
Playlist is not playing one after the other
There hasn’t been a response from PLEX in that thread so I thought it could be brought up here with the relevancy being that the only feature that allowed any kind of continuous autoplay is currently not functioning.