Quitting Photoshop on Close

I understand your confusion with how various Adobe programs close, but someone reminded me that Adobe programs are not developed under one roof by one team, but in many locations and each team would have their own reasons. Non-disclosure agreements hide those reasons from those of us outside the programming staff.

That's why it's better just to stay away from the red button and use Cmd-Q to exit all single and multiple window MacOS progams if you want that consistency.

... here is my problem. You are asked to quit LR because of possibly many documents but you are not asked in PS even though you may have spent days editing one image? Pick a workflow for all Adobe products. You mention LR does not have a SAVE and PS does. Again, that makes no sense. They both are editors. I use Lightroom and CameraRaw. They do the same thing!

By @jamesgerboc

It actually makes sense from the perspective of how each applications works, and they don’t work the same way.

Photoshop follows an older model, more like Microsoft Word: If you want to work on a document, you open the document, it appears in its own window or tab, and you must use a Save command.

Lightroom Classic follows a newer model that is actually quite common now in many recent Mac and Windows applications — for example, Apple Photos now works in exactly the same way. When you want to work on a photo in Lightroom Classic, you do not “open” it but simply select it, and when you make an edit, you do not have to remember to “save” because it automatically saves every edit you make as soon as you finish it. (This is why applications like Lightroom Classic and Apple Photos have no File > Save command on their menus.) If you just now moved the Exposure slider, when you let go that changed is saved in the Lightroom Classic catalog database. And again, unlike Photoshop, it is possible to sync or paste edits to hundreds of photos at once, and as soon as you finish that, all those edits are saved to all those hundreds of photos at once. All those changes and you did not have to remember to save.

So, that should help make it clear:

Photoshop uses the old model where you must use a Save command, so if you are going to quit and a document has unsaved changes, you must be asked if you want to save before quitting.

Lightroom Classic uses the newer model where there isn’t even a File > Save command because saving is done for you with every edit, so when you quit, naturally there is no need to ask you if you want to save before quitting. (This is a slightly different question than being asked if you want to quit.)