OBDII is a standard but doesn
OBDII is a standard but doesn't go deep into subassemblies or specific modules. This is true on any car. You want to talk to the body control module? That's not OBDII. You need a factory tool.
Here in the US, we have a "Right to repair" and factory diagnostic tools have to be made available to the public (often at very expensive prices...)
How TESTA got away without putting an OBDII port on the car from the factory is amazing...
Tesla has the best efficiency in miles per KWH, but that lead is shrinking (check out the MB EQS). they have speed of engineering that the legacy car makers don't have. And they have a charging network to die for.
The legacy companies are catching up. And they are better at most facets of manufacturing cars than Tesla is.
Charging networks are expanding, the Supercharger network isn't going to be an advantage for long.
Hey! It's a good time to be a car lover. BEVs, PHEVs and ICEs all have great product out there.