A roll cage also highens the total gravity-point of the car, wich was a possible issue for the Ford Explorer. So making it saver also gives sooner rolling over.
The Ford/Firestone affaire had more inpact on tire-pressure advice then you would think.
the law of having TPMS or some kind of warning for low pressure , to my opinion is made because of it. From 2014 also in Holland where I live, this has to be on new cars.
In Europe before 2000 Normal use advice pressure was of axle loads determined by the car-maker for 3 persons and a little load.
After 2000 Normal advice pressure is given for GAWR's and called for 4 persons and load.
As late as 2005 American TRA swiched over to the calculation for pressure and loadcapacity to the formula that the European tyre-makers have used for decades for all kind of tires, saying it was for globaly going to the same system. But only chached for P-tires and XL/extraload/reinforced, for wich the old used american calculation lead to to much deflection in the lower pressure/loadcapacity range. Has to do with the power used in the universal formula . For calculating loadcapacity for a sertain pressure TRA used 0.5=root and for lower then 50% H/W division tires 0.65 , LT tires C-load and up 0.7.
ETRTO used from about 1970 0.8 power . the higher the power the lower loadcapacity for the same pressure. Power 1 is linear calculation so part of maxloadpressure is part of maximum load.
For C-load and up American TRA still uses the old calculation, wich can give similar F/F-like affaires in the future
This inadequate calculation used and repaired by a band aid of 10 substaction of maximum load of P-tires for SUV or whatever you call it, thoug was not the main cource of the failures. But chanching the formula to my opinion is done with real reason of the experiënces with the Ford /Firestone Affaire.
My opinion , and what I made of administrative study , is that the off-road looking tires of Firestone had large profile blocks that cover a part of the sidewall , wich makes this sidewall lesser part to flex savely.
To get less deflection for the same load on the tire you need higher pressure.
In fact ,of those tires a to high maximum load is given on sidewall still.
Also goes for somewhat other reasons for low Hight widht division tires.
So a problem that is still existing at the moment.