Nio ET7 electric sedan has 620 miles of range and an self-driving system

They're a newish company but not brand new. In my visit to china in 2019 I occasionally saw their SUV's in major cities and even visited a dealership. They've had several models in production prior to this car that have been well received and to me were quite impressive.

It’s battery is 50% bigger than a model S. 150 kWh vs 100 kWh. Not really a 50% range gain like you are thinking. Just like you could build a 2 inch phone with a really long battery life, so can you cram a ton of batteries in a car. This should mean it is heavier than a model S (which is already 5k pounds) which has other implications.