2 cents
I think, for me, utilizing A/C examples is instructive. The narrow band of flight between Stall and Stall is exquisitely interesting. Two types come to mind (Essentially the same A/C with different power and wingsets). Both are vicious in the Stall, and virtually unrecoverable. The F-104 and the U-2. Lockheed (Kellly Johnson) designs. Nearly 60 years old and still flying. The U-2 cruises with 2-3 knots separating Vmo and Vne.
Gup? Christiaan?