I agree. I've often said TV writers don't know how to write endings. First, they never know when it will end, and second, the plug gets pulled before they can figure it out. So, yeah, in this case, Sam had written it as a feature originally, so I think he had an ending in mind when he the chance to turn it into a TV show. Yes, M*A*S*H (and the Korean War) did end, unfortunately in the former instance and fortunately in the second, but I think comedies have more staying power than dramas as they're more character-driven than plot driven. JMHO.