There's reciprocity, and then there's reciprocity.

Some states like OH may let you drive a rusted out pile of junk, but others won't. MD only requires that you get the car inspected when you buy it, and never again.

Some states require a non-CDL Class A license for a big motorhome like mine. VA doesn't have non-CDL Class A licenses, so it's impossible for me to get one. VA says a standard license is all I need.

Then there are states like NY that call a half ton pickup a commercial vehicle even if it's just a privately owned commuter vehicle not used for commercial purposes.

NY just changed the definition of commercial without contacting Websters.