Very cool, but it's just a messaging system, I gather. So even connecting to one of its servers gives away the fact that you use it. Maybe not right now, but sometimes. But you could hit it through VPNs or Tor or whatever, I presume. Gotta read the paper
Mirimir, its still the classic dilemma. You and I can and do communicate privately and securely with each other. Its our casual family and friends that just don't get it. How to automate this for everyone holds the key. Good luck with that!!
I believe any successful privacy enhancing service will get attacked in the same way as ProtonMail and others have been. They want to spread FUD so it doesn't become widely adopted.