Some of the features make it sound dubious. "Real-time collaboration". Why would you bake that in your terminal?
* log in to AWS * push commits (though that's mostly in Emacs now) * tail logs from remote services * use ssh * random grepping/cat/awk/sed one-off stuff
I don't see any of those benefiting from real-time collaboration. The use-cases presented on the landing page don't make sense to me either - when my entire team is debugging production, we usually fan out and all look at different things rather than needing to fan-in and all do/look at the same thing. And if I want to chat I'll have Slack open next to the terminal.
This is where the real-time collaboration comes in. Easy to teach novices how to use powerful shell commands to make things easy.
If I want to save a session, I use tmux. If I want to share that session, I use tmate.
I can also self-host tmate on my own machines which makes it even more attractive.
I think some of the session stuff is nice, but it's not for me.