Sequential read and write rates approach that of standard SATA III SSDs all in a USB drive just a fraction of the size. How it might sustain such high performance rates over long periods, however, can be tricky.
https://www.notebookcheck.net/Patriot-launches-Supersonic-Rage-Prime-USB-3-2-Gen-2-stick-with-5-year-warranty-and-up-to-600-MB-s-read-speeds.546758.0.html
So, why doesn't this get the aluminium heatsink treatment? Just make the fins long and it's skin-friendly. The name is certainly gamer-y and cringe enough to deserve some black-painted metal.
Albeit the considerable heat, the issue here may be cache exhaustion. Some of these devices have SLC/MLC caches with TLC/QLC storage to improve the burst speed and overall write endurance. Since TLC/QLC cannot keep up with the cache, the sustained speeds may be impacted over large transfers.