Is that by design?
On Mac OSX, lots of applications do not ask for such an exit confirmation so I came to the conclusion that it was not what Mac users would expect when using the Quit command.
IK: lots of applications do not ask for such an exit confirmation
I think none of them does. But there are levels of Macness (and Madness):
@LA, once upon a time, there was a check on macOS too. At that time, macOS was called OS X. But the latter is not relevant here.
The prompt is there, indeed. But depending on whether you quit directly or first close the project before quitting, the dashboard (the selected resources) will look differently. This is unlogical.