> That is not true for networks where link capacity can change rapidly, such as Wi-Fi and 5G.
Is this problem almost exclusively to do with the "last-mile" leg of the connection to the user? (Or the two legs, in the case of peer-to-peer video chats.) I would expect any content provider or Internet backbone connection to be much more stable (and generally over-provisioned too). In particular, there may be occasional routing changes but a given link should be a fiber line with fixed total capacity. Or is having changes in what other users are contending for that capacity effectively the same problem?
Is this problem almost exclusively to do with the "last-mile" leg of the connection to the user? (Or the two legs, in the case of peer-to-peer video chats.) I would expect any content provider or Internet backbone connection to be much more stable (and generally over-provisioned too). In particular, there may be occasional routing changes but a given link should be a fiber line with fixed total capacity. Or is having changes in what other users are contending for that capacity effectively the same problem?