The show lasted 7 seasons. It was obvious it wasn't likely to last much longer, but it's still a sad day. The West Wing was the only show that I scheduled my evening around. It has remained incredibly consistent and filled with quality writing. The political conversations and plots weren't just window dressing for a show about relationships - they were actually the point of the show.
The only comfort is that the old episodes are endlessly entertaining, so like Sports Night, I can get my West Wing fix whenever I need it.