So there is a possiblity the hardware is there but the code to take advantage of it is not.
I did turn on 2 TC-R1 lights, one with the 2019 and one with the 2020 driver and put them side by side on the table until they got fairly hot, but I did not push it because I have had a 2019 driver die on my a few days after I used the light for an actual emergency where I had to repair my girlfriends home lights that shorted. so the light was on top of a wardrobe on max until the battery almost died, while I was repairing the lights. It got quite hot but kept working and as the battery was depleted, output and temperature were lower and the light cooled off and kept working. A few days later, the light would suddenly not turn on. Replacing the driver fixed it. It looks like temperature killed the driver but not on the spot. In any case I am since reluctant to repeat the experiment and was excited to hear the 2020 driver may have some kind of thermal regulation / protection, but my short trial did not show it has. Maybe it needs to be tested for longer.