I'm not a mechanic but a farmer. My Milwaukee impact has replaced my air impact and has twice the power. I put new steer tires on a semi, one side I have never taken off since I owned it, and zip both sides off with easy and put them back on and still had 50% battery. I've helped out a friend in a shop and my impact had more torque than his air.
There are times though, I wish I had a good air impact. Never having to remember if I have a fully charged spare battery and the air impacts are easily half the weight of my Milwaukee. I use too much air to not need a compressor and air tools are a much cheaper option. Air tools aren't going away. When I'm out in the field or on the road though, I am sure glad I have my electric impact though.
There are times though, I wish I had a good air impact. Never having to remember if I have a fully charged spare battery and the air impacts are easily half the weight of my Milwaukee. I use too much air to not need a compressor and air tools are a much cheaper option. Air tools aren't going away. When I'm out in the field or on the road though, I am sure glad I have my electric impact though.