Their battery management system is really, really good; the motors are probably the most efficient; they have the longest range (a bit arguable, I admit). The batteries are super efficient (Wh/kg) and with relatively low defective rate. Their invertor and how do regen is also very good (albeit it could be more flexible but that is a software problem).Would you elaborate a bit on why you think so?
I know that 400v architecture is considered old but they did a really good job with it. 800v is coming but it will take 5-6 years before it is mass adopted.