Well, a very intresting piece of information, and completely new to me, that (parts of?) the hotfix/jb survival code are performed after any reboot. (The latter is the much better wording instead of "restart" which could easily be confused with the never ever "
reset (to factory defaults)" function, though this unfortunately is Amazon's wording...)
I'm normally very carefully watching my devices even if "simply" rebooting them. I've never seen such additional " **** BRIDGE+ **** " etc. messages from the jb hotfix code when doing this. Only, of course, after all and any firmware updates (but these are no "normal reboots" in my understanding). And I certainly remember also not to have seen this message popping up shortly when doing the above mentioned manual (second) reboot after a preceding fw update, and I, in the next step, re-applied all my hacks via MRPI to get them finally running as intended.
Now I'm really wondering why the "factory reset" is such a problem? Okay, it clears the user space completely - but if you first make a complete copy of
all (including even the hidden "system") directories, and of course including /mkk (this is where the "user visible" part of the hotfix resides), /extensions, etc.: Why isn't it possible after an accidentally performed "reset to factory defaults", to just restore the complete backup of the user space now, then perform a local reboot to reapply all user keys via the (now again present) hotfix code - and everything is fine again?!?