Based on answers to the following question:
Which development environments did you use regularly over the past year, and which do you want to work with over the next year? Please check all that apply.
Neovim is the most admired code editor in the 2024 Stacked Overflow Developer Survey
Source: https://survey.stackoverflow.co/2024/technology#admired-and-desired-new-collab-tools-desire-admire
There are many small details that make Discord better, possibly because their focus is on making multi-modal communication as rich as possible. There are many things they can improve upon but, they’re miles ahead of the competition right now.
Zulip is really neat. Telegram is easy to set up and has a native desktop client and scales well. Self-hosted XMPP is nice, as as the name says, it’s extensible. Mumble has a mid interface but great performance and privacy.