My 2017 X with AP3 and MCU1 is going in tomorrow for the issues noted in this thread. I've taken videos of the incredibly laggy behaviour, constant reboots and missing functionality.
Does anyone else experience a complete loss of warning or notification sounds? Like turn signal, seat belt warnings, autopilot sounds, everything is gone and system requires a manual reboot.
I've had the lack of sounds before (turn signals as I recall) - I realized its a precursor to reboot/crash coming.