Three notetaking app attempts sitting in my private repos, all stalled at the gap between idea and free time. With Claude Code I finally got the one I really wanted out in two months. Building it has been the best hobby I've found. Beats games or scrolling. When you've been carrying an idea for years, the app that finally ships has more of you in it, and I'd bet we'll see a lot more of these from solo builders.
But who will buy it? No knocks against building old projects, but the market will be flooded with extremely speciality projects. I miss when every app had a spec on the box. I think we need something like that for usage. A new modeling language or something.