Here we go, when I started that project in 2006, I had plenty of ideas. I still have, but everything else is in the way, including me.
Since there have been some amazing apps, like RawTherapee, Darktable, and possibly some other I miss, apps fullfilling some of the uses I envisioned for Niepce back then. Not to mention a few other apps that did just disappear ; that's life, it's hard to find maintainers or keep being motivated.