I did some Q&A with Tesla employees through chat few days ago. Bad news is they not offer ludicrous mode upgrade anymore. It's certainly a new way to force you to buy MSP, but I prefer a more flexible choice of upgrade. Since the end of spring quarter, it's no longer free upgrade for Ludicrous mode. Instead, a software addition of 20 K, Yes just software. When you purchased MSP (Or P100D) they have already built-in ludicrous mode. But 7-15 price changes, this upgrade has become the standard option for MSP. I have not received any news about upgrade options of Tesla Ludicrous mode to MSP owner. I wish they would do that one day.