Yes, although, more generally, they make it easier to deal with large wheels with low clearance when mounted with lug bolts versus stud & nut. Without these, you have to levitate the tire in front of hub and rotate it to align the five holes, while simultaneously getting at least two lug bolts started to hold tire in place--- all while you are paranoid about banging into your rotors (that prob cost $3K each or more).
Although definitely not impossible to change wheels without theses, its a lot harder (for me).
I didn't get a flat, but there is no spare-- only tire sealant goop and a pump. I guess I assumed that the tires are run-flats, but I just took a peek and they don't say run-flat on them, so the procedure is "patch if you can, otherwise tow."
Ugh. Not sure if you're trolling me, but the overheat problems are well known, and mainly impact the A8 automatic. I have the A8. It overheats. If you leave the car in auto "D" mode, it (like the NSX) will select the optimal gear for TQ, meaning very high revs (higher than most humans would choose in a manual car). That is part of the problem. You can extend the run time by manually shifting at natural shift points, or even a gear higher than normal for manual car--- car does not lack for torque. Also seems to help to crank the heater on full (literally painful in 95-100 deg heat, but it helps). In addition to oil/water overheat, the power steering likes to randomly fail in high heat-- that is scary first time it happens, but you get used to it.
Supposedly, the 2017 models just shipping now have addressed heat issues and Chevy will eventually offer a "reasonably priced core exchange" program to swap out for the new cooling bits.
I should stress that you need to be pushing pretty hard to overheat in <90 deg heat. Most drivers will never encounter this, which is why the forums are full of overheat "deniers."
Another data point: I have heard that Z06 overheats more on the 3-mile Thill course (two 120MPH straights and 135+ MPH main straight) versus the tighter 2-mile course. I have not personally run the Z06 hard on a short course, so cannot confirm.
But, back to NSX, I was super pleased that in >100 deg heat, leaving car in auto-shifting in Track mode (crazy high revs), the NSX had ZERO heat problems (it got very hot, but no warnings from car). Of course, as I learn the car and stay on power longer and brake harder and shorter, my results my change but so far, so good! (And I worry that a more HP oriented track woulds stress it more).