I use playlists as a way to sort tracks that need to be deleted from the library on my computer or have their metadata edited. Once that’s done it would be useful to be able to multi-select tracks with a long press to delete them from the playlist.
I support the idea of a general multi-select capability. I regularly play some subsequent tracks of one album, without playing the album as a whole. Currently I have to drag’n’drop each track one after the other to add it to the queue. A multi-select and then drag all tracks to play/queue would be nice.