True, though they are more common than you think, there’s still thousands of flights daily across the U.S. and where I live its the only mode of transportation in/out of a lot of communities. On thing that’s common though is a mod to allow the planes to run on car gas, 85 or better octane. That helps us and them (much cheaper) and a lot of modern small aircraft are moving to diesel piston engines like the Thielert engines.

And its still not entirely banned in the US, AVGAS for small planes is a “low” lead fuel that still contains a decent amount of lead.