I've been wondering if the cutoff is actually much earlier. Say 50% of cars on the road are EV, how many gas stations can continue to run profitably with 50% less customers? Even getting and refining the gas requires massive global supply chains to transport and refine, what happens when there's a 50% drop in customers? Do they lose their efficiencies of scale? Do prices rise substantially as this happens?

I suspect once we reach a certain thresholds it will create other push factors toward EV's and accelerate their adoption.