This is especially useful for media composers:
Say you’re working on multiple cues for the same project, right now you can either work on the different cues in the same timeline in the same project but for navigating is uncomfortable or exporting with timecode for example it’s not ideal, or you can have multiple project files but switching between them takes a lot of time, some users may use VEP to solve this but it should be much more simple - same tracks, same settings\routings\inserts etc and you can switch between timelines\sub projects easily within milliseconds.
Please make this happen on Cubase and Nuendo, it shouldn’t be that difficult and lots of other pros will be forever thankful