Re, E-Tron's "150kW" charging:
1) There are almost no charging stations in the world today which can provide that. All of those "175kW" and the like CCS stations are V1 CCS, which has a max 200A limit; to get 175kW you have to charge at nearly 900V, which no EV supports. Real EVs cap out at 80-90kW on them. Only V2 CCS can handle 150kW for "normal voltage" cars (max current 500A, liquid cooled cables). These are the "350kW" stations that they're only just beginning to install. Unless E-Tron can switch halves of its battery pack from parallel to serial (ala Taycan) to up the voltage for charging, it cannot get 150kW from current chargers. Not that there's even that many V1 chargers at 150kW+.....
2) Model 3 appears to be at least 150kW, possibly 180kW. We've been told that it already supports higher charge powers, and that all of Tesla's current production line can already handle V3 powers. The battery pack supports 525A, so capping out over 180kW at realistic voltages for max current. Ingineerix argued that the cabling only supports 430A, so over 150kW at realistic voltages. But that's A) at steady-state temperatures, B) without any heat-sink effect, and C) without any air circulation. I'm not sure that all three of these conditions apply to the Model 3's charge cabling (the first one certainly doesn't for the first couple minutes of warmup time)