At 40% coal provided electricity, electric cars are already way less poluting than combustion engines. Actually even just being powered by an efficient diesel generator would put them on a roughly equal level. So only 40% coal is already a benefit. But of course, we should get rid of our coal plants as quickly as possible. That is the one rather low hanging fruit in reducing the carbon footprint. And I think the 2038 number won't stand, the ramp-down will be far quicker now that climate change has finally gotten more awareness.
So, while not reaching the optimal numbers right now, any electric car bought today will still drive when the coal usage for the grid will be greatly reduced if not completely stopped. Any combustion engined car bought today isn't only worse in emissions already, it won't change, while the electric car gets "cleaner". Also, one should not underestimate the positive effect have on the rollout of reneweables as they can be charged at different times of the day, depending in the supply of reneweable energy.
So, while not reaching the optimal numbers right now, any electric car bought today will still drive when the coal usage for the grid will be greatly reduced if not completely stopped. Any combustion engined car bought today isn't only worse in emissions already, it won't change, while the electric car gets "cleaner". Also, one should not underestimate the positive effect have on the rollout of reneweables as they can be charged at different times of the day, depending in the supply of reneweable energy.