When hardware reset is asserted (e.g. thumbwheel reset) all the chips get a reset signal to reset, causing them to reset their state and registers.
lemme just stop you right there... you can reboot with the two wheels WHILE DRIVING. Not just while driving, but while on Autopilot. While navigating. And it will still use the blinkers at a fork and take an exit WHILE rebooting.
That's how weak the two-wheel reboot is. It's purely a software reboot of the touchscreen, nothing more - hell, if you sit in the car while parked, no matter how hard you try (hold brake or not - another point of contention), you might notice that the HV battery never disconnects. The scroll-wheel reboot is purely rebooting the screen, not the whole car.
Updates, though, if you've ever sat through one of those, do a complete cycle of the entire system... top to bottom, end to end, everything gets touched and updated, and rebooting is part of that process - microcontrollers can't update while running, so they go to bootloader, take the update and apply it, and then boot back to the main code again. Thus, a reboot is inherent in the process.
This is a silly diversion in my opinion, away from the topic of the charging issue. Obviously reboots have had nothing to do with the stop charging issue. We can't have any impact on it from here - Tesla needs to handle it. Anyone bothered striking up a support chat conversation about it so far?