Worn rear axle threads

[Conaway2]

I’m sure this is a common issue - how do you deal with worn rear axle threads ? The rear axle on my car is original, and I can just imagine how many times the axle nut has been removed and tightened. Although the threads aren’t stripped, I’m pretty careful now when I tighten the nut.

At some point, it will be a problem. Is the most obvious repair re-tapping the threads to a slightly smaller size ?

Thanks - Jim