To Not Winterize in PA?

I simply hook up an adapter to the city inlet and blow 40 psi air through the system. Takes a little longer than hooking the water pump up to the antifreeze jugs. I still go through the sanitizing/flush sequence of the water system in the spring. About the only savings with air (besides $10-$15 in pink stuff) is I don't have to unscrew a panel and the pump intake. So fewer steps with air, but a little longer in time. The longer time is the multiple stops and starts at the faucet to push the final water slugs out.

For me, I should go back to anti-freeze as I won't be using the unit at all this winter. The benefit to air is its easy to repeat if using the unit during the winter.