How do modern cars regulate temperature so well?

I agree......but the concensus here seems to be otherwise? ??
To each their own, I guess. I usually run a 160* or 180 t-stat and my cars never hit 200 - ever. We took my wife's '77 Ramcharger from Illinois to the Grand Canyon in '18, and it never came close to 200* We turned it about 2500 rpm's all day long in the heat.