I recently found myself writing a desktop app, and realised that for the first time in my career I could actually implement the Model View Controller design pattern as it was originally intended (as opposed to the disjointed approximations we use in web apps).
I'm afraid to say this led to an hours-long debate with Gemini about the "right" way to implement MVC, where the LLM kept contradicting itself and going round in circles. It reached the point where it was literally saying one thing and then doing the opposite in its example code.