I think email will always have a place as it's a great fit for certain types of communication - legal and finance come to mind first.
I think Twist is an interesting balance between the two.
One feature so Twist (https://twist.com/) that I liked was it allowed to share the link of a group that anyone could then become a part of. The issue is for the free version the messages remain for a month only.
What I found nice about the feature is that I could use it to create an instant communication channel for my website for people to collaborate.
Do you have a similar feature in your app? If it has I will integrate with my site asap.
Really? That's unfortunate. I was really hoping for a thread-style channel, similar to this, for more discussion-style Discord servers.
A better replacement for the current quoting system is not bad, though.