Overall, this seems like a dodgy workflow at best
You could either duplicate your chunk before you start doing your edits, or save to psz and do your thing there
I cannot figure out how this could help me.
Let say I duplicate the chunk, and what I can do after that? By having a lot of points is not so easy to remove the outliers.
Most cloud point editing software allow to isolate a portion of the cloud and let you work on this particular, as many outliers, when you work with points, may be unvisible due to the presence of other point behind that. With agisoft I cannot do that, and this is why I use this workflow to solve my problem, but it works with mesh or sparse point cloud, not with dense. The algorithm works differently on dense cloud, and with no sense, I would like just It works as for the mesh or sparse cloud.
1.2.0 version practically put the psx as the main project file, and psz just to archiviate the project, but the psz doesn't save, for example, the "build Orthophoto" process results. Anyhow this procedure is not correlated to the file project type.