Yeah..........nut won't come off with the little impact...........grab the Gorilla Impact..........hit that sucker again..........then settle in for the job it's gonna be, when you ruin the nut, or snap the stud/bolt
Nothing, and I mean NOTHING, beats a hot wrench. Unless you like ruining stuff. Yeah, I know there's places that aren't fire friendly, but in most cases, you're better off heating the fastener.
Sometimes it takes a few heat cycles. Sometimes heating, then dousing the fastener with water, will cause thermal shock that breaks the rust bond(replace the fastener when done). The impact will, many times, need help. Don't just pound away until you ruin something.
Electric?????? Go for it if you really must. Personally, I don't want to be hostage to non standardized batteries that may become obsolete. Or having to buy multiple batteries to have on hand when the one in the tool dies.
Electric(battery) has a place in field work, if you don't have a portable compressor.
In addition, to be fair............................air tools can be expensive to run too. Big compressor. Wear on that compressor over time due to high CFM draw rate.
The King of The Hill is a corded tool that will do what your air tool, or battery tool, will do. No down time. Higher current motors. More power.
Being on a budget, I look at bang for the buck. An expensive battery operated tool ties up money that could be used for mill/lathe/welding tooling. It's a cost/benefit thing.
We have too many choices in this country. Marketers hot after the money in our wallets. Don't be a victim. Decide what you REALLY need.