It seems to me that the mathematician that introduced the cycling world to Hopf bifurcations didn't even look at the dynamics of a bicycle, so it bothers me a little that people talk about it like it's something that ends arguments about speed wobble/shimmy. I hate to have to listen to a podcast to learn if what the silca guy said shed any light on the matter. If you don't tie it back to a physical model with predictive power, it doesn't really settle anything.

There seems to be an international split in the vibration engineering community over "damping" vs. "dampening." In the U.S., vibration engineers generally assert that "dampening" is the process of getting something wet. But outside the U.S., "dampening" is often used to mean something that removes energy from a vibrating system. Both words have the same root, so it's difficult to make an argument either way based on linguistics.