Gosh! Something new in Networking! Not.
Around a quarter century ago, Network General's Sniffer was a product I used often. It just plain worked, right out of the box. If you prefered FOSS, a promiscuous ethernet card and tcpdump worked quite nicely, and still is quite useful in the right hands, with some scripting (there were alternatives for token ring, arcnet, starnet, etc.).
Marketards and manglement need to stop trying to be engineers ...