Comment by Terretta

Ray Ozzie's Groove, by Groove Networks, embraced and extinguished by MSFT:

Ozzie, who had previously worked at IBM, was particularly interested in the challenge of remote collaboration. His vision culminated in the creation of Groove, which was released in 2001. The software distinguished itself from other collaboration tools of the time by allowing users to share files and work on documents in real-time—even without a continuous internet connection.

Groove’s architecture was innovative in that it utilized a peer-to-peer networking model, enabling users to interact directly with each other and share information seamlessly. This approach allowed for a level of flexibility and responsiveness that was often missing in traditional client-server models. Asynchronous collaboration was a key feature, where team members could work on projects without needing to be online simultaneously.

https://umatechnology.org/what-happened-to-microsoft-groove/

We built some things on it, was like CRDT for all the things.