I didn't even know Northern Calloway died until almost ten years later. I accepted the storyline, moving to Grandma's farm (all throughout the 70's David was studying to be a lawyer. A New York lawyer turns farmer? Green Acres, anyone?)
But his character had been phasing out for a while. One poignant reminder, during Luis and Maria's wedding, David was seated waaaaayyyyyyyyyyyyy in back. And David and Maria throughout the 70's were boyfriend/girlfriend. The wedding was bittersweet, knowing David wouldn't be around much longer.
The tabloid sensationalism didn't help. David freaks out, runs around naked, smashes windows, blah blah blah, sad case. And during his last season, he looked horrible, gaining so much weight, forgetting lines, what a shame.
And since then, various cast members had said precious little about him.
It's too bad David didn't get a bigger sendoff, but at the time, CTW seemed to handle it the best they could.