What will we lose when Hacks ends? A brilliant, bracing inside look at the costs and gains of artistic creation; a workplace comedy as bold as it is comforting; a chance to watch Hannah Einbinder and Jean Smart regularly exchange barbs and admiration. All of these things, certainly. But as I watched season five’s second episodic pairing (and, sniff, the last one ever for the series), I found myself thinking about how much I’m going to miss these…