Yes, I realize that. The core temp can be higher but Tcase is a good target to shoot for keeping the load temp under for 24x7 IMO.
I agree, if you can stay under the tCase you are better off. But it's always good for people to realize that you can near the tcase temps on a full load box without being in the danger zone.
You may be able to run them that high without shutting down, but you will reduce the lifetime of the processor due to electromigration, which has an exponential dependence on the temperature.
I often wonder what the real world time difference is. For example, would it take a processor that might last 8 years and shorten it to 3 years...or would it be more like a CPU that would have lasted 72 months only makes it 71 months?
I personally believe that enthusiasts obsess way too much over temperatures. A small few might have a true heat problem, but the vast majority are probably perfectly safe for the entire useful life of their rig without a dozen case fans, the perfect thermal paste and the most sophisticated CPU cooler which can be purchased.