There is a new MCU processor seen in a Model S with a build date of 2/18. The usual slow UI (compared to lightning fast Model 3 UI) is now just as fast. Software queries suggest the processor is Intel instead of the older Tegra. UI build on this Model S is also not a build available fleet-wide 2018.6.50. Also newer hardware like 5Ghz Wifi. What makes this SUPER exciting is that this is like finding the "missing link" between Neanderthals and Homo-Sapiens. If this Model S has the Model 3 MCU processor but all of the software functions common to the S/X like auto high beams and 5 seat heated seats, wifi, that would mean that these features could be coming to the Model 3 much sooner. Fingers crossed!