I love this sentiment. I built a beer inventory app exclusively for myself + guests picking a drink to try when when they’re over at my house. I’m up to 26 “users” over the past few years, but most of them just browse on my phone when they need another drink.

When I talk about the app, some people immediately jump to other inventory problems in their own lives: Can you make it work for my wine fridge? Could I keep track of my kids’ ever-changing wardrobe? I’d love to manage my Warhammer collection this way! It certainly seems like there could be a consumer product to help tackle those problems, but it’s not gonna be my app.

Edit: In more of a work context, I think internal tooling for specific users or teams can feel similarly empowering. When you have an intentionally-constrained set of users, finding product-market fit and making sure the solution actually works for their needs becomes the only goal. And with so few users, it’s easy to keep tabs on what is and isn’t working for them.