Wrong way to think about it...never will "all passengers" be doing something. Same as any network (ISP, IDF closet, cell network, stadium, department store, e

Wrong way to think about it...never will "all passengers" be doing something. Same as any network (ISP, IDF closet, cell network, stadium, department store, etc.), you plan for oversubscription. Think 10:1 oversubscription for a starting point. So 180 passengers > 18 active users > 20mbps per active user. An airplane may have more active users if the service is free... A network that is not oversubscribed and provides full non-blocking throughput to downstream devices is by far the exception: high-end datacenter spine/leaf systems come to mind as an example.