I am surprised that there hasn't been more discussion about Band in a Box in this forum.
I sell Music technology products for a living and so a) have access to them and b) need to understand them to some extent.
For a long time I was put off by the BIAB user interface, but having tried out the Realtracks feature, I am surprised that the more advanced musicians on this forum are not regular users. (Perhaps they are but keep it a secret.)
Here's a video I made to demonstrate how BIAB can be used to add additional instruments to my basic voice and guitar recording.
Band in a Box demo