> didn't Plan 9 have a very interesting persistence concept that did away with the entire notion of "saving" something — very similar to editing a document in a web app nowadays, except locally?
Though I find that to be an absolute mismatch when I'm opening a document for reference purposes only, which means that any edits I might make are either accidental or otherwise only meant to be temporary (like if I'm opening a DWG drawing of a plan and am drawing some additional auxiliary lines to take some measurements or something like that). Automatically saving a safety copy to guard against program crashes or something like that is fine, but automatically overwriting the master file with my changes definitively isn't the right thing in that case…
Though I find that to be an absolute mismatch when I'm opening a document for reference purposes only, which means that any edits I might make are either accidental or otherwise only meant to be temporary (like if I'm opening a DWG drawing of a plan and am drawing some additional auxiliary lines to take some measurements or something like that). Automatically saving a safety copy to guard against program crashes or something like that is fine, but automatically overwriting the master file with my changes definitively isn't the right thing in that case…