Yeah, you know, composers and musicians have all sorts of snippets, lyrical and musical notes, drafts and other droppings all over the place. Some they develop, some they discard, some they figure were shit to start and not worth spending more time on. Occasionally, there may be something workable in there, but the large majority is just random notes.
Classical composers left behind numerous notes, sketches, drafts, musical phrases, ideas and all sorts of musical empherea - none of which anyone would dare try to use.
Beethoven wrote more than the known 9 symphonies, but threw others in the trash (today, unfortunately, they would probably digitally still exist, for some desperate person to try to cash in on). He left a very useable draft of his 10th symphony, which has been completed a few times, but it will never be considered a Beethoven work and is nothing other than a curio.
Same as Now and Then.
I liked Free As A Bird and Real Love. They were Beatles records. Now and Then is a Macca appropriation, IMO.