Music\Artist\Album
How I use it.
Select an album and play it in track order.
Add an album to a playlist. Not always the current playlist. Also Add an album to a new playlist.
Select several songs using Ctrl-click and add them to a playlist. Or create a new playlist from them.
Browse the list and add a single song to any playlist.
Rearrange songs in a playlist. Including the current playlist.
All actions are drag and drop or context menus.
Note that none of these actions interupt the music that is playing.
I also use the keyboard a lot to navigate the folder tree and add songs to the current playlist.