I can't beat those great photos so won't post anymore
but want to thank
@spiderguy and everyone who came along for such a great drive!
And I learned something about my Roadster: for the first time in 2 1/2 years of ownership, I now know what the acceleration pedal feels like when the PEM gets hot enough for the firmware to limit power: the pedal feels like mush!
It was 95F in the South Bay and Mt. Hamilton is at 4,265 ft elevation. Halfway up the mountain as I exited one of the innumerable tight curves on the road I pressed the acceleration and...the car slowed down. The cognitive dissonance of that scrambled my cortical neurons for a moment and then I tapped the VDS to bring up the drivetrain temperature screen. The PEM was showing yellow. Oops. The car was limiting power to prevent damage. That had never happened to me before.
I continued on very slowly (max 15mph) and soon came across
@doug parked by the side of the road. The 1.5 he was driving had the same issue. Later I learned that another 1.5 on the drive also had experienced the same issue. We all made it to the top, eventually.
I am aware that the 1.5 cars are known to have this issue. Of the four 1.5 cars on the drive, three had the issue on the way up the mountain. None of the other cars experienced it.
I had Tesla do the standard maintenance on my Roadster about 1 1/2 years ago, which of course included cleaning the fans and ventilation ducts. Maybe it is time to do it again (I know some people do it themselves and say it's not difficult but I will leave it to the professionals at Tesla: where I live the Service Centers are used to dealing with Roadsters).
Anyway, it was a fun drive and I enjoyed the company. We had a special guest at the start of the drive: a longtime Tesla employee showed up with his Roadster and chatted with us, very nice guy, but he couldn't come on the drive because he had to go to work to meet a deadline! Such is life working for Elon...