<>things change<>
What won’t change is energy density.
A battery will never approach the energy density of gasoline.
Let’s say it has 1/2 the density. as you may know, you can get a gas vehicle with a 25 gallon tank - has a range of 500 miles @ 20 MPG.
So, the battery “compartment” will be 2x the size of the gas tank, but a lot of savings from engine/trans etc.
Now, if the cost to operate/mile is based on what I pay currently for electric (10 cents/KWH) and gas is average of 3$, you can see why it’s getting a close look.
Oh, and the batteries are designed to last 300-500k at least, if not 1M miles (goal that I think can be hit).
BTW, i am a car performance enthusiast, and drive a Mustang GT 5.0 California Special, previous car Supercharged Roush.
A friend of mine has a Tesla Model S, and I have ridden in it. His only complaint - the supercharger is not near his house (he gets free charging still i think).
You have taken a fact (energy density) and made it more than it is...how much more volume does all the mechanical stuff to convert the gas into go does it take (that takes space and weight, too).
I bet you are hoping the solid-state battery is not going to happen soon. As you know the energy density is higher than current LiON, and it’s SAFER than gasoline or LiON.