Would really love if there was more of a seamless blend between all of these great features. I think perhaps Projects should be the primary system. However, the collaborative markups of sessions is so much better then the checking in and out of files in projects. I think any and all files that are added to a project should automatically become a session, and the owner of the project has the power to turn them off, flatten and archive them. And then the third component is Sets, which is such an awesome tool for slipping in updated sheets and really quickly looking at previous revisions and markups this has got to be baked into Projects/Sessions as well.
