I would appreciate being able to transfer tracks from a project, into a new project template.
If you began a new project using your template, wouldn’t import tracks from (old) project into the new project (with template) work?
That’s what I’m currently doing,
The small issue is, a lot of the time… you want to be looking at and studying the tracks of which are going to be imported.
So currently, I’m opening up the project that contains the projects, putting the tracks I want into folders named import. closing that project, then opening a template, then importing tracks from project.
Sometimes also, when writing and experimenting, people come up with multiple song ideas in the same project. So it would be more efficient to be able to do my suggested way.