How many people, in reality, use their car for long 400-mile trips to random locations that are 'in the middle of nowhere' enough to not have an electric socket available. Maybe 5-10% of road users? The other 90-95% are covered by Raj's description of what the Tesla delivers.
You're confusing road users with journeys.
Maybe only 5-10% of my journeys are long drives to places where I can't conveniently recharge, but that still means that an electric car doesn't meet all my needs, and an IC one does. An electric car is therefore of no use to me, except as a second car. If I only have one car it needs to meet 100% of my needs, not 90%.
And before you suggest renting an IC one for that 5-10%, remember that for that to be possible requires someone to make those IC vehicles, and maintain a refuelling network for them, just like today. That is unlikely to be practical if it's only for 10% of journeys, many of which will be bank holidays and summer weekends, when everybody will be trying to hire at the same time.
EVs certainly have a niche market in pollution-conscious places like cities, although it will be interesting to see how popular they remain once they are taxed as heavily as all other vehicles instead of both them and their fuel being subsidised.