Yes, exactly. Having to have the backend infrastructure adds a lot of costs. For some of my apps that I've been building with local storage, I've considered adding a paid sync feature in the future if I ever launch anything that gets a lot of usage and there is the demand for it.

I really want to build apps that don't trap users. I'd like to have users stick with me because I provide value, not because I "own" their data. I also want to build free apps. And finally, I want to decrease the environmental footprint of my apps. Local storage is perfect for these goals, at least for some apps that don't absolutely need centralised storage.