Neither 1) hiding each APRX in a project folder or 2) filling a directory with different project geodatabases, tool boxes, etc are great options when creating a new ArcPro project. We were able to sort and find ArcGIS MXDs by date or at least see all of the different MXDs in one place, and these option could be possible if in the Create a New Project dialog box there was the option to save the APRX in a different location than the default project folder. The work around is to create a new project, saveas the APRX someplace else, and delete the original in the newly created folder, but this is cumbersome and not necessary. Quickly searching through all the project APRXs in one place would be ideal for many workflows.