I don't really get the appeal of not hitting save in the editors I'm using. But I don't have 20 windows open. Maybe some people use 20 or 30 apps at once. I just know when that stuff first came on the scene it was broken more often than not. But I'm a skeptic. Took me a long time to try Chromium based browsers. Now every other is just a backup.
edit: speaking of automatic save, one thing that still bugs me about Windows after using VMS for a short time is the lack of auto backup built into the file system. Worked a bit like Tidy in AutoIt3 Scite editor. Every time you did a Tidy it wrote a numbered backup before saving the current file.
Only in VMS it was built in. Just hit Save button in any editor and current MyFile.txt is saved, the most recent backup is MyFile.txt;1 next most recent MyFile.txt;2 etc..
There was a purge command to clean up excess backups. Just backing up to one file with a .bak extension as is common in Windows is nearly useless.
Windows Seven Ultimate tries to do something similar with shadow copy and old versions of files, but it's not nearly as smooth. Plus there seems to be some nebulous formula which files get old version backup and which don't. Guess when they hired the VMS guys to do NT they didn't get the file system guys. Too bad.
