"For the guy who thought atc should have known by the plane stopped on the runway, dia is huge with multiple runways. I think the taxi distance from the far runway is around 4 miles. "
I know that, but still I think you don't get my point. Taxi distance is irrelevant here. You clear an a/c to land, it lands, for quite a long time you have no confirmation that it rolled out and vacated (either observing visually, or on surveillance, or from 'vacated' call), and there's no bell ringing.