Discord has started to rollout their refreshed UI for their Desktop/Web versions.
Keyword: "refreshed". It's not a complete change, just tweaks here-and-there.
Noteable things:
The Channel List can now be manually resized (via click-and-dragging the divider between it and the Chat)
Two new free default Themes added - "Dark(er)" and "Midnight". The old Dark Theme was renamed to "Grey" Theme. (Yes, you can use these without Nitro).
Text Box in chats has been redesigned. Now the buttons inside it are underneath the Text Box (no more losing text box size on small/tall monitors). The toggleable "Send Message" accessibility button is still inside the text box
Inbox & Support buttons have been moved up to the global title bar, so they can be accessed globally regardless of where in the Discord app you are
The current User box under the Channel List now overlaps into the Server List (goodbye short-lived floating Discovery button I guess).
New User Settings for the density of the UI (in User Settings -> Appearance); choice of "Compact" (similar to old UI) and "Spacious"
Images of the refreshed UI across all four (not two!) default themes - in order; Light, Grey, Dark(er), Midnight:
and images comparing "Compact" vs "Spacious" UI densities:
