I'm not an artist but I'm amazed by what they can create and very proud of participating to a project that is so visually appealing. I would be very sad to see this work from humans replaced by generated contents copied over from someone else's work (because "generative" AI creates from plagiarized content, for now).
Jason, the content you sent is beautiful, but knowing that no one spent time on it, demonstrating their skills through it, removes all the value in my eyes. I'm on 0 A.D. to do something selfless, spend much time on something for the love of it. The end result is not by far my main metric of satisfaction.
Similarly, genAI could generate documentation and increase our metrics on this front... but without real added value. If an AI can deduce what the code does, maybe documentation was not absolutely necessary at this place. Worse, it can generate low-quality comments which mask the need for detailed information written by competent developers.
And, my main concern, regardless of the very personal input I'm giving above, is the carbon footprint of these tools, which is ridiculous. If we're accelerating the catastrophe just to splash shiny images on a hobbyist game, we're being very careless. That also includes using genAI for inspiration.