People vibe one-off solutions for themselves all the time. They just don't have the desire to productionalize them. Frankly, product knowledge is something LLMs are not that good at
Low code solutions like PowerApps I bang out stuff like this all the time. If your use case is limited enough, it makes lazy developers very productive.
Same. I hate doing mobile coding, but just in the last few months I AI-coded 3 apps specifically for my needs. They'll never get released publicly, because they'd need polish and features that I don't care about personally. They potentially replace some SaaS too.