I think everything you’ve said has been pretty well disproven, but I wanted to comment on this because I love the XB-70. The XB-70 incident you mentioned was an aircraft that as I remember it made an emergency landing while still heavily loaded. The loaded weight on the XB-70 is around 530000 pounds. Empty weight is 253000 pounds. We can safely assume the aircraft in question was within these weight parameters during that landing, and max braking at those weights is likely to cause a brake fire. The F-15 you compare it to has an empty weight of 28000 pounds and a loaded weight of around 44000 pounds. Again we can assume the accident aircraft was within these weights. It’s clear to me that a 253-530K pound aircraft with 1960s brakes and early, if any, ABS and unique experimental wheels would be, idk, maybe a little more susceptible to brake fire and tire blowouts than a 25-44K pound jet with modern ABS and brakes as well as more refined tires.