I had a Zeiss ZM that had its lugs very worn, to knife edge on one side, in just two years. So I decided not to use metal rings at all on my straps. I tie up some small (1 cm) two strand loops of waxed linen thread, much softer than any lugs, and use those to attach my straps to the camera. Yes, every four to six months I have to tie up new ones since they fray with use. But it's cheap (pennies per year), I always have a couple tied up and ready in my camera bags, they are plenty strong enough, and I know for 100% certain that my lugs won't wear at all. Simple DYI.
EDIT: I got the idea from Gordy's Straps -- he uses waxed linen thread too. Plenty strong.