We've been using AOO for the audio part of our VRR project
https://vrr.iem.at/concerts/, where we did online rehearsals and live streaming concerts with New Music students at our university. Each player was sitting in their home town, using a cheap audio interface and mic. The sound sources were spatialized and enhanced with virtual acoustics, so that people got the feeling of playing in the same (acoustic) room. We were really happy with the audio quality. Because we were using a server-client-architecture and people had bad internet connections, latency was a bit high, but it didn't really matter too much, as we chose the pieces accordingly.
The next step would be to add a peer-to-peer mode for lower latency and write our own video streaming app, so we're not depended on third party apps anymore. We also want to be able to freely arrange and manipulate the player's videos on the screen, which would be great for live streaming concerts (e.g. zoom in/enlarge videos on solo spots, arrange videos based on the position in the virtual acoustic space, etc.)