The eternal gap between engineering effort and actual user needs. Left side: a complex, feature-rich cat tree with multiple platforms, tunnels, and scratching posts that probably took weeks to design and build. Right side: the cat sitting contentedly in a plain cardboard box.
It's the perfect metaphor for that time you spent three sprints implementing a sophisticated notification system with customizable preferences, only to discover users just wanted a simple email. The cardboard box of solutions.
The cat's smug face says it all: "Your overengineered solution is impressive, but have you considered just giving me what I actually asked for?"