[pi-e-sigma]

The parent is just moving goal posts. The whole idea behind multiplexing data streams inside a single TCP connection was that in case of a packet loss you don't lose all your streams. But it doesn't work in practice which is not really surprising when you think about it. When you have multiple TCP connections it's less likely that all of them will get reset due to connectivity issues. Whereas with data multiplexing when your single TCP connection is reset all your data flow stops and need to be restarted.

[kikimora]

A problem with radio signal or with a wire would affect all TCP connections at the same time. It does not matter if it is one or many, the outcome will be the same. I believe in real life this is a majority of cases. A problem affecting just one TCP connection out of many on the same link must be related to the software on the other side, not network itself.