Apparently all is right with the world again.
Last night, I got the 2019.16.2 firmware upgrade on my 2015 Model S P90DL. Max Battery Power option is restored. A fellow I know who was a Nissan and Honda sales manager went for a ride today. He was in the left seat. I tapped Ludicrous+ and enabled MBP. I had him stop on a lonely two-lane desert road. Wheels straight ahead then hit it. He did and Tessie immediately hit back. The car leaped and surged. "HOLY (DELETED)!" he said, shocked. Yep, things must be right with the world again. When we got back to my place, the fans were still cooling the battery. He stared at the car. "I may have to get me one of these," he said softly and respectfully.