I like using File groups. They make it easy to collect montages and files associated with a project in one place. However, in their current state, they’re almost “in the middle”, between a Project and a File. But, by organising projects through File groups (instead of Project(s)), several can be open at any time, making it easy to compare settings etc.
Therefore: it would be great if it was possible to save a File group, just as you can save a project. For me, this would be a huge workflow enhancement.