Honest question:

Should whether an application is running or not be a concern to you? Why would you ever want to actually quit an application?

Granted, I understand that in reality the app might be misbehaving, hogging resources and whatnot and that the underlying OS isn't perfect and we should absolutely have control over how our hardware is utilized, but from a UX PoV I think the notion of a running process isn't of interest to me unless I am developing software.

If I close a window, I just want to get it out of my way. I only leave things running as a workaround to the possible slow cold start the program may present.

> Should whether an application is running or not be a concern to you? Why would you ever want to actually quit an application?

same reason why I want the parts of my house that I rarely go to to be tidy ?

I mean, you'd achieve the same thing if an application closed after you completed the tasks that used it?

I want it out of the task switcher.

Quitting it won't do that, MacOS keeps the icon on the last 3 programs run in the dock (task switcher).

The task switcher is what pops up when you press Cmd+Tab. And showing recent apps in the dock is optional.

When you are done with all the windows in your editor, do you open a new window by choosing File > New? You don't open a new window by clicking the dock icon?

If you close all the tabs in a browser window, should it close the window or display a new tab page? Or just do nothing but show an empty tab bar and a blank window pane? That seems like the worst possible solution, because it always requires more clicks to do whatever you were intending to do. At least closing the window or opening a new tab will save you some clicks 50% of the time.

I hit Cmd-O or Cmd-N, depending on what I'm doing. Personally I barely use the dock for anything, Cmd-Space for Spotlight is faster, and I use Cmd-Tab to navigate between open programs.

If I close all the tabs in a browser window, the window should disappear, yes. If I close all the windows, the browser should stay open, so I can start another window if I want to.

That's the whole point of this user affordance, there's a difference between closing the last window and closing the browser! If I want to close a whole window at once, that's Shift-Cmd-W, Cmd-W closes just one tab, and this works for any tabbed window on any native Mac app.

No amount of Cmd-W will quit the application, and Cmd-Q will always quit the application, maybe prompting and maybe not. They're unrelated commands, especially since most applications will save your windows and that's most often what I want to have happen.