Anyway: Do you argue such an extension would not be wise to have?
20 TCP connections might be cheap for CPU and memory, but it also means more network traffic which might not be nice if your bandwidth costs per kilobyte (mobile phones).
I'm not sure if this really needs to be an extension. Rather server could just send untagged STATUS updates to client whenever it feels like it. Only problem is that most clients seem to ignore it if they didn't request it themselves.
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