I love how the disc feature is implemented in Plexamp, but it would be even better if there was a setting that stopped playback at the end of the current disc. I often use the disc feature to separate the original sequence of an album from any bonus material, and I also like to hear the silence at the end of a record. Then I can go on to listen to the bonus material if I choose. I imagine not everyone feels this way but it would be great to have as an option in settings.
Somebody recently created a very similar feature suggestion, asking for an option to add only a single disc from a multi-disc album to the play queue. I suppose this might cover what you’re looking for. If so, please comment/vote in that thread in order to avoid distracting or cannibalizing votes from each other (in that case I’ll close this thread as a duplicate).