Elias, a digital archivist and adrenaline junkie of the obsolete, had hunted this update for months. Rumor on the dark web forums was that the "2021 Update" contained a fix for the "entropy leak." Others said it was a trojan horse designed to melt BIOS chips.
Updating these units requires precision, as using the wrong firmware can lead to "bricking" (irreparable damage). This is the safest method if your head unit supports it. zxdz 2021 update