It does improve that fast. In 2010 the Tesla Roadster got 240 miles of range and it's performance was 0-60 in 4s. In 20202 the Tesla Model S gets 400 miles of range and 0-60 in 2s Double or Nearly doubled in both metrics. I'm confident by 2035 there will be electric trucks with like 500+ miles of range and like 200-250 towing which will be comparable to ICE and if fast charging takes 20 minutes today it will probably take like 10 by then.

Regardless this is still pointless, I really don't want to argue about hypotheticals. Time will tell, if the tech doesn't catch up ICE will stick around to fill in the gaps until it does. If something better than Electric comes along we'll see a shift to that instead eventually. The world isn't going to end because ICE gets completely or mostly phased out.