> What about the issues with lithium and coltan supply for batteries ?
Lithium is in large supply (Atomic Number 3, right, third place on the Periodic Table), and is easily recyclable from current batteries.
Cobalt is a miniscule portion of current battery compositions. Most battery companies have been working to minimize or remove it. It should be recyclable, but it's never been economically feasible to recycle it from current battery compositions because a) it is such a minority component of current batteries, and b) Cobalt is cheap. (Cobalt is a "waste product" or by-product of Nickel mining today. The threat to Cobalt supply is that most Nickel mines today are in politically questionable regimes such as Columbia and the Democratic Republic of the Congo. But Nickel mining is likely something that continues to happen regardless of politics.)
> What about the ~+33% increase required in electric power generation to replace oil in transportation ?
If every car on the road today switched to EV tomorrow, but made sure to charge only during the "bathtub" of off-peak (evening) hours, there's absolutely no increase in power generation needed. Our culture's day-time peak generation capability, which has to account for most of our industrial use, is more than sufficient so long as consumers are smart about when they charge.
(The difference between Peak demand during the day and off-peak evening hours really is huge. "Filling in the bathtub" that the off-peak hours create in the demand chart is considered something of a holy grail for decades in utility grid planning because it would mean more base load generation that doesn't have to shut down every night and can run more continuously/smoothly every day.)
Smart Grid solutions exist and are being planned where cars can even help solve demand problems by acting as sitting batteries (as owners allow them to) that utilities can "loan" power from a car during peak demands, and pay back with "interest" during off-peak (and potentially doing so at an incredibly granular level).
All of which is to say that there are already market solutions to the increased electricity consumption of EVs.
Peak rates might go up, perhaps, but the natural tendency of most EV owners is already to charge during off-peak (at home on the evenings), even without the extra incentives of big cost differentials between peak and off-peak utility rates. Most EVs today already have okay off-peak hours selection tools built-in, even without the detailed electricity price-sensitivity options that Smart Grids might eventually bring to the market. (But Smart Grids are certainly on utility road maps because there's a lot they could do with that extra demand sensitivity.)
I've yet to hear a worst case for EV electricity demand that would need 33% more capacity at Peak demand. That's an interesting and presumably unlikely scenario.