I go into the lounge for the bathroom because it has better toilet paper
Other than that, I no longer see a need/desire. I don't fly LCCs so I don't need food (either I ate before or will on the plane) and liquids can be brought past security so there's no need for something to drink. The WiFi in the lounge is worse than in the terminal, and worst case scenario, I could always tether my phone.
Am I missing something? Entering the Dan at some points feels like entering just because I can