Yes, that's a good point. But: the grid can be expanded and probably will be expanded. I don't have a BEV but I've run the numbers and it would work very well for me today, it's just that I have an old, non-connected and fairly recently rebuilt car that I'll drive into the ground. But if I were younger and still in the market for a new vehicle I would definitely consider an electric one, though I'd make sure it had LiFePO4 or maybe even LTO in it (not yet available). Battery tech is getting better rapidly now that sufficient funds is pumped into it and I would expect the next two generations to be major improvements over what's on the market today.
This 100%, we're not done with batteries yet as a society and it's probably one of the most heavily funded industries because the opportunity to strike "gold" with good battery tech is too large to ignore.
Lithium wont be used forever and and downsides to batteries will slowly be eroded until we wonder why we ever used petrol in the first place.
As far as the grid goes, in my eyes rooftop solar is going to provide a huge amount of the power generation required for EVs. We're not there yet but the price of solar keeps dropping rapidly and you'll see a shift in messaging from "discounts and charge overnight when demand is low" to "discounts and charge during the day because generation is high".
I could already supply an EV with all the power required for my trips inside the country. 7700 KWh surplus from solar this year and we're not done yet. That's a multiple of what an EV would use for my current mileage (which is a fraction of what it was pre-COVID, and to be fair I also use my (e-)bikes a lot more than before).
