Mac OS, especially in the olden pre-OSX days, was at least consistent here. Files autosave invisibly and frequently, to give the impression that the file in mem

Mac OS, especially in the olden pre-OSX days, was at least consistent here. Files autosave invisibly and frequently, to give the impression that the file in memory and the file on disk are the same thing. So long as the rules are simple and predictable, they can be learned. But now the different disciplines are mixed. Does it use save as, or duplicate? Does it sync with external changes on the disk, or keep your work open in memory? With apps being so cross-platform these days, they rarely respect the interface guidelines of second class citizen platforms.