I would like to see a different GC rust... an ability to integrate into an external GC system that it is embedded in, like Javascript or Java or whatever else.

I would like to see a different GC rust... an ability to integrate into an external GC system that it is embedded in, like Javascript or Java or whatever else. In other words, `Gc<_>` would mean "owned by the other runtime". I think there was a proposal like this, though I am not sure what happened to it.