When you have a great compartment from which to watch the world go by and free meals in the dining car, why go into the coach section? On the Coast Starlight, you have the Pacific Parlor Car, an old 1955 Sante Fe bar car, which has plush seating, good booze and great views.
If I were Hsu, I'd get a Deluxe sleeper and stay inside except to eat.
I've had food delivered to my sleeper in the past. I'll admit though, I haven't traveled via Amtrak for almost a year now. Cabin service could have easily been eliminated.