So 2018.12.1 fixes issues 2018.12 had on 3's. Did you mean that the S got 12 or 12.1? Because 2018.12 has been loading on S and X for the last ten days.... If it's getting 2018.12.1 also, that's interesting.12.1 is a bug fix. I was one of those first 3 Model 3s with 3018.12 and my install failed twice causing me to have to take it to the service center. 12.1 was the fix that corrected the installation problem. The first time it failed, it disabled autopilot. The second time, autopilot worked but the log still showed that the installation failed. While charging afterwards, I was getting a Radick charging for your messages on the app and when I went back to my car, the stereo was blasting at 100% while it was charging. Weird and I hope that that is all now resolved
Also, for what it is worth, the loaner P90D Model S that I’m driving right now just updated this morning to 2018.12 too. It is a 2016 with AP1 hardware.
S and X:
3: