You're extolling the virtues of web apps, but none of your points address the point that it requires centralized components. Which is an important point for something that advertises itself as P2P.
Both to serve the application every time you open it and ICE servers for webrtc connection initialization every time you share a file.
A native p2p application needs to be downloaded or built once, from any place (say a git mirror) and bootstrap to its overlay network and then you're in.
A native p2p application needs to be downloaded or built once, from any place (say a git mirror) and bootstrap to its overlay network and then you're in.