A lot of how I use AI is to assist me to build the software manually. I focus 1 function and ask it to fix or implement it. That's a good way to use AI. But if you mean using AI to improve existing systems, I also think that's being a done a lot. For instance, you know Krita the KDE drawing program? They naturally added a way to prompt image generation, based on your initial doodles, which makes a lot of sense.