I think cybernetics the practice / math is alive and well, even if cybernetics the name is mostly discarded. Take a look at Wiener's wiki page:
Wiener is considered the originator of cybernetics, a formalization of the notion of feedback, with implications for engineering, systems control, computer science, biology, neuroscience, philosophy, and the organization of society.
The right way to read that is that it's used in seven fields, not zero.
Cybernetics is alive but I think it's misleading to call it well. When talking about an issue like weight loss the dominating paradigm is "calories in, calories out" and not a cybernetics inspired paradigm.
We don't live in a world where any scale on the market allows automatic calculating of the moving averages of the hacker diet.
Quantified Self as movement is based on Cybernetics. At first European conference Gary spoke about how cybernetics is not well.
I had an old professor in university who taught physiology based on regulation system think...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.