Air quality is a problem that basically all of the first world has solved to varying extents that depend mostly on whether the local areas are affected are rich enough that it tops their lists of problems.

When the developing world gets rich they'll care too.

A lot of the air pollution from cars is from brake dust and tire micro particles. EVs do result in less brake dust, but the tires are still a problem.

And if you live on the West coast, it was recently discovered that an essential chemical used for tire durability and safety causes mass deaths in salmon. (Or rather, the chemical breaks down into another chemical, which causes mass salmon death, and probably other fish death too).

I will appreciate never having to hear a damn diesel truck again, however. Those things should be taxed heavily for noise pollution in addition tk their massive particulate emissions.

Since you couldn't realistically replace all ICE vehicles right away, it'd help ease the transition and especially in rural areas, air quality might not be a big concern anyway. If you end up with a surplus of clean gas, you could just burn it in dedicated plants and take care of the NOx there, or use it for aviation and in agriculture.