I've got one cartridge with a worn stylus that renders some minor but audible distortion on the inner-most grooves -- that's definitely where you'll notice issues first. To be honest, it still sounds awesome on the outer and middle grooves. But obviously it's high time for a re-tip, and I don't play it since I noticed the issue. Unknown hour count on this one, but I absolutely knew it was high up there when I acquired it (early 1990's Koetsu).
I've rotated through a lot of cartridges over 7 years, and I haven't put enough on any 1 cart (~ 400 hours max) to drive it into audible wear. So I've never encountered any issues besides on that one.
I've rotated through a lot of cartridges over 7 years, and I haven't put enough on any 1 cart (~ 400 hours max) to drive it into audible wear. So I've never encountered any issues besides on that one.