I had no context so i wasnt aware what you were talking about but i understand if the case is that it trains the AI

Regarding 2. Thats a more specific usage of AI upscaling that i couldnt guess youre referring to and im sure not all upscalers train AI and i agree that it doesnt always look appealing but theres many usages of AI upscaling that cause no harm

What’s wrong with AI upscaling? Genuine question