I think a lot of it depends on your long term tool strategy.

If you plan on acquiring multiple air tools, your first purchase will be a larger compressor, then begin acquiring air tools as you need them. This is a long term strategy for heavy duty work.

If you're a weekend warrior who occasionally needs an impact wrench, without the need for several hundred foot lbs., it makes more sense to get an electric impact wrench.

The choice becomes corded or cordless. I have a corded Porter-Cable impact wrench from the mid-90's and use it for tire rotation, and other small quick jobs.

I have an air compressor and impact wrenches for high-torque, heavy automotive jobs.