That's true with an ICE car and a Roadster on a track. The Roadster has a little problem with not getting enough heat in the brake fluid, which it needs to evaporate the moisture that accumulates in it. That's why Tesla started recommending that you flush your brake fluid at least every 2 years. Several of us on this forum have noticed the fluid thicken and turn to sludge if you wait much longer than 2 years if you live in a humid climate.
Thanks for your kind words HCSHARP.
Just a note as to brake fluid from what I learned as a former mechanic and as a former street modifier/racer, (and as an additional explanation for BART513):
AFAIK...regarding brake fluid changing color and requiring change every 2 years...
DOT 3 and DOT 4 brake fluids are hydrophilic. They actively absorb water in an effort to shield brake parts from oxidation induced wear and blockage. They also degrade with heat over time. As such, all my vehicles get new DOT 4 every 2 years. Humid areas will allow the fluid to see more water so it will scavenge more water, and thereby degrade more quickly. This is not just a TESLA phenomenon. Just go to any one of your other cars and compare the fluid in the overflow with fluid in a new container. You will immediately see the color difference.
A heat shield will speed up the process of fluid degradation, as well as create "fade" as per the video that was provided by Wiztecy. I believe the heat range of brake fluid is just shy of 500 degrees F. Retaining heat expands and even vaporizes the fluid. The fluid no longer transmits forces effectively to the piston(s) in the caliper(s). Clamping forces are delayed and reduced and can result in longer stop distances. This is why many racers have air ducts pointed at the braking systems. It is not just to keep rotors and pads cool. It is also to keep caliper temps under control.
DOT 5 is hydrophobic and should never be used in cars not meant for DOT 5 use, as DOT 5 repels water and will not protect parts. Worse, water will collect in dependent areas and corrode those areas.
For those of us under warranty, I suggest letting Tesla do the changes each and every time, for documentation purposes.
Best,
T