This is the point - a constant stream would be easily detected from metadata alone.

There is no need for constant stream.

don’t know why you’re being downvoted. That device already has a ton of space to buffer updates.

Unless they have invented some kind of magic compression then I can. The Echo either sends nothing or tiny pings. If they’ve invented some kind of subspace coms channel that can stream an hour of voice over 12kb, then props.