Lets say EV cut co2 emissions by factor of 100x for each km traveled.

Lets say number of cars in total follows exponential progression, 5% growth per year.

It follows that after 100 years due to growth co2 gets back to original level. (Log100/log1.05=94)

EVs are required bandaid, but degrowth will come eventually. (Possibly due to climate change supply will decrease and so will consumption)