Is it possible to have unsaved, open buffers stored in a project? For example, if I terminate Sublime with open buffers, they’ll restore when I re-open sublime. I’d like this to also happen when swapping projects. I was sure this is how it worked on Windows, once upon a time, but it’s definitely not the case here on my Mac. Did I misplace a setting? Am I mis-remembering?
I know, I could save the files … but that’s not what I’m trying to accomplish here. 
If it was working on windows, but not on Mac OS, try Reverting to a clean state (backup your data).
If not work also, search the Core Issue Tracker for an issue like this for Mac. If not found you could open a new one.
I’m not confident it was working on windows, I could be mis-remembering. I can’t test/confirm myself, so I’m asking if this is the intended behavior, or if it can be done.
I think it is. But I am not sure if I understand correctly so, I recorded an animation, it is like this you want to?
That’s exactly what I’m talking about, @addons_zz – is there a setting for that I’ve accidentally tweaked somewhere?
May be this setting. Other than this I do not know, but I just set it to false and it was kept working.
First, try to reproduce it on a clean Sublime Text install. So if not, see if there is a bug request for it on the core:
//
// Application Behavior Settings
//
// Exiting the application with hot_exit enabled will cause it to close
// immediately without prompting. Unsaved modifications and open files will
// be preserved and restored when next starting.
//
// Closing a window with an associated project will also close the window
// without prompting, preserving unsaved changes in the workspace file
// alongside the project.
"hot_exit": true,
Explicitly setting it to true in my settings seems to have fixed it. Strange that I had to add that setting, though – true is supposed to be the default behavior. Thanks for helping me sort this out!