After removing the chat service from its game launcher so that it could be reworked to "align with the rest of the Ubisoft Connect experience," Ubisoft has announced the return of the feature. . Starting today, you'll be able to chat with people again through Ubisoft Connect (formerly known as Uplay and Ubisoft Club), at least on their desktop app. Meanwhile, the chat will return to the Connect overlay for "the next few weeks."
Ubisoft considers the new chat service will be faster, more stable and reliable, while providing players with a "safe and friendly environment". If you find yourself talking to an idiot, or worse, you can block them or report them.
One consequence of the new system is that established chatters will start with a “mostly clean whiteboard,” with only a few active group chats retaining their message history. From now on, group chats will also be limited to just 24 players.
Ubisoft claims that this reworked chat service will allow it to "quickly deploy new quality of life features, additional anti-toxicity measures and facilitate deployment on additional platforms beyond PC in the future." So it's basically the first step in a new cross-platform chat service, which it does Connect support for cross games.