Quantum resistant encryption will now be enabled by default in all direct chats. For the new conversations it will be enabled from the beginning, and for the existing conversations it will be agreed after you exchange several messages with your contacts - you will see a notice in the conversation when it happens.
The groups currently do not support quantum resistant encryption yet - we plan to add it in the future to small groups.
I’d suggest you give SimpleX a shot. It has a desktop app, private notes, forwarding and now qre! The main issue with it is that it’s new and doesn’t have a business model.
It’s like X, but simpler.
I’ve used SimpleX a little bit and quite like the concept. The biggest challenge is that it is not well known and almost no one is on it. Also one of its privacy strengths, no phone number, is also a huge weakness in spreading adoption. At work me and my colleagues use Signal and have been for several years. But getting everyone onto signal was pretty seamless due to how easy the phone number system worked to link everyone together…would be a big lift to move to a new app.
Same issue for me…the app is super promising but getting people on it is a pain. And there’s really no point in downloading a messaging app if no one else is going to use it 
It’s not an issue for me because people don’t use any private messengers!
That’s been my issue with Matrix et al. Or anything FOSS really. I’d be happy to help out, but no one’s asked yet.
Squints at the service’s main page
…Is this blockchain? I dropped Session as soon as I figured that out.
I don’t think so. They just use some system which is a mix of federated and decentralized. It’s either genius or stupid.