This is just warn folks used to rebooting their MCU1 while driving (I used to do that every few drives, when the browser would stop working or some other artifact - Tesla software is not famous for its stability). After applying v10 I was driving with the family to dinner tonight. Browser (now taking up most of the screen ) was dead as usual so I went for the thumbwheel reset. What a disaster! First, it took 5+ minutes to reboot, WTF? The front windshield started fogging up, so I had to open windows to continue to drive, which of course was uncomfortable for everyone since it's fall and we don't live in California. Second, Thumbwheel reboot used to only reboot the big screen (MCU1), however this time, after few minutes of dark main screen, my instrument cluster went dark too! So now I'm driving a car without HVAC or any screens at all, not even a speed indicator. Now, the cluster was only off for a short time (30-60 seconds maybe) but it seems like forever when you don't expect it. When it came back on it has messed up controls but at least you could see most indicators. Even once the main screen came back on, it still took a bit before it was responsive enough to turn on windshield defrost. I so wish Tesla would keep MCU1 on v8 with security patches only. My car gets worse every update.