Is this project abandoned?

[cdnsteve]

I don't see any updates to commits since 2022, has this moved to another repo or been forked somewhere else for main development?

[michaelmcleodnz]

I just got here from this list of abandoned Mozilla projects, so at least someone at Mozilla considers it abandoned.
Edit: It looks like there's more context in other issues like this one.

[opencoca]

Mozilla stopped supporting it and handed control to oskarkrawczyk and their jsfiddle project. You can see it in action using the base integration that is part of jsfiddle.

TogetherJs would be best served by containerizing it so it was easy to deploy a relay hub.