> The private key is stored in the browser’s localStorage.

Woah.. when will those people learn? _Any_ browser storage is unreliable. Anything goes wrong with your web experience? Clear browser settings. Make new profile. Re-install browser. The browser's localStorage is not a replacement for filesystem. It cannot be backed up, it is super volatile, and it should _never_ be used for anything important. It's one of those "worst of both world" cases, where malware can access it with no problem, while legitimate backup programs are locked out.

(And yes, the post mentions "new device" flow, but how many people would (1) remember to export their private key and (2) won't lose it with their device? I bet in practice people will use the network until the first time localStorage is lost, and then they will get annoyed that their feeds are lost forever, and will likely leave the network for good)