Hyper-individualized software is what LLMs are best for IMHO. They lower the bar so much that it's becoming perfectly feasible and reasonable to amase a large amount of software which is fit to your exact personal needs and preferences.
Exactly: The app can do only one thing, and does this one thing very well. Other approaches are not implemented or planned. Its like a specific dentist-tool that you need for one specific task.
Yeah, I have a dozen random tools that do specific things I need that wouldn't be useful to anyone else, and that I wouldn't share in their current state anyway. But they're fine for me, and without LLMs, I wouldn't have spent the time to build them.