There's (kind of) a way around that, if you don't build sharing things to the public in an anonymous way into your system.
SyncThing and Jami are fine because they don't provide publishing tools the way BitTorrent does, just personal use and private group tools.
There's still lots of unexplored potential that has nothing to do with publishing, but most P2P devs seem to be most interesting in trying to get rid of all centralization entirely and build a whole new internet.
I don't follow Mozilla news, but it looks like FF Send claims they closed because people were using it to ship malware.
SyncThing and Jami are fine because they don't provide publishing tools the way BitTorrent does, just personal use and private group tools.
There's still lots of unexplored potential that has nothing to do with publishing, but most P2P devs seem to be most interesting in trying to get rid of all centralization entirely and build a whole new internet.
I don't follow Mozilla news, but it looks like FF Send claims they closed because people were using it to ship malware.