Reporting two bricked devices from this thread:
https://www.mobileread.com/forums/sh....php?p=4478014
A PW4 and a PW5 Signature Edition, running previous version of the hotfix that litterally destroyed correct storage mounting point at normal boot time and also when attempting a reset boot. This seemed to be the problematic code:
https://github.com/KindleModding/Hot...bd7b1752a8a420
If anyone has a lead on potential fixes there, including hardware mods and EMMC low level access, please do let us know on this thread or the other.