Ask HN: What key features of Instagram would you need in a future alternative?

We are including basic features like private photo storage plus curated groups for sharing and commenting. Our big focus right now is getting the user experience very high-quality and it got me wondering: Are their small features that keep you interested in Instagram that maybe I'm missing?

Because we are focused on encrypted and p2p sharing, we aren't tackling fully public sharing yet, so maybe that is a key feature you'd want.

But also the little things, the ways that you comment or interact, the integration with the messaging system. Discovery?