Been over in a car w/o a roll cage. interesting experience.
Programming from years of racing ~and thinking through all possibilities~ made for a less than awful outcome, only a dislocation or two and a helluva whiplash two years later.
~that said, it was a hard-top and I am alive to say it would have been messy for the cleanup crew w/o the steel over my head.
Doors opened on wheels-down landing with extra foot-power, there was still glass, in a few places, but there wasn't a place left to have crawled out if that was needed - Roll Cages are a good thing.
...on the exam of left-overs, I'd have to say window nets are a plus or minus - this rollover would not have used them ~ and the hardware would still have been accessible even with the massive deformation a no-cage car took if it had been installed like recommended (with a seatbelt snap on one end) - just one more thing to shed on the way out...
~also, hands low on the wheel, cradled and open rib cage, head down, eyes closed, feet high on pedals and about squat-pressure in legs, I flipped "'bout eight" times with an endo... Arm restraints would have not made any difference, I Still would have scragged the CS and rotator cuff when the B-pillar came to get me.
- BUT, if I'd endoed and then flipped, (shown in a few vids of other mini's doing acrobatics) the doors rip off - and THEN I would have liked to have had arm restraints...
For this cage and this car I like no net and left arm-restraint.
I think it comes down to carefully analyzing your cage/seat/car and choosing what is most EFFECTIVE for the racing purpose (in this case Lemons) you are involved in.