In response to the comment further above (so not just the article), outbound network path management is not uncommon. However we often see it presumed to be uncommon by those who haven't thought of it, or have thought of it but the ability to do it is out of their reach.

Qubes makes outbound network path management easy enough but it's not too hard to do on Linux and FreeBSD, so it can also be done on machines with modest compute resources (which may or may not be subject to the machine being an older machine) as well.