P: Upgrade catalog without changing the name
Lr needs an option, on catalog upgrade, to "upgrade in place", so as not to change the filenaming scheme that the user has already put in place. This could be as unobtrusive/simple as:
- Duplicate the catalog files
- Zip up the copy set with an archive name (user or automatically generated for schema version)
- Delete the "copy" files
- Upgrade the catalog without changing it's name
I have no use for the catalog schema version number unless I'm trying to recover back to a particular version. This would be more useful to me:

Why is this valuable to me? Because I have multiple Lr catalogs and each time they need upgrading I have to do the file management and naming for each catalog in order to retain straightforward naming structures. Otherwise the names start to get out of control (see below). Doing this manually introduces the jeopardy of the user deleting something that they didn't mean to delete...

