Because increasing the range of a petrol car is practically free (and in many cases the tank sizes were kind of notionally set 50 years ago when engines were fa

Because increasing the range of a petrol car is practically free (and in many cases the tank sizes were kind of notionally set 50 years ago when engines were far less efficient; as engines got more efficient no reason to make them _smaller_). Like, virtually no-one is driving 700km non-stop (that's going to be probably eight hours unless you have excellent roads the whole way; it's arguably _unsafe_, and certainly most people would want to at least eat in that time), but, really, there's no downside. For electric cars, there _is_ a serious downside to having huge range; it makes them expensive (and heavy). So manufacturers will tend to stop at "sensible for most use cases". I'm sure there are some people for whom electric car range is still a problem, but it's a niche market, especially in _Europe_ (again, you can drive across many countries in Europe in 400km).