How does this compare with the joy of using a view camera and live view?
With live view you get a bigger brighter picture, and you can position the screen for your comfort, and zoom in ... so I would have thought that ground glass does not come close?
I'm not sure of the point you're trying to make. The ground glass is 4X5 or in my case 6X9cm, using a loupe is akin to "zooming in", under a dark cloth the image is usually very bright, although not always. Using a larger monitor with a DB means more weight and fiddling around to connect and to mount (in the field on a tri-pod leg) near the camera.
Also I've found that many of the small portable monitors and LCD panels are difficult to view in bright day light. It might be arguable that as you are looking at an unsharpened image (and magnified thru zooming) on the monitor that the image on a ground glass, seen with a quality loupe, is sharper.
So again I'd agree that using live view or a ground glass on a view camera for viewing are similar. Both have advantages and disadvantages.