I'd like to ask people who have been using good quality diamond stones for several years how you feel about the durability and performance of the stones compared to other types of stones like water or oil stones. If you sharpened knives all day for a living how long do you think diamond stones would last before they needed to be replaced? One week, month, year, many years, etc? Of course I'm talking about stones of high quality like DMT and others that I have never tried. Another thing is the stones would have needed to be usedd and maintained properly. Any other stone they are compared to would also need to be of good quality and taken care of properly. Kept clean and flattened when needed.
I have never had a diamond stone wear out but I have only sharpened my knives and a few others but really too few to mention. My use is no heavier or lighter when I've used other stones also. I have seen a significant amount of wear on water stones to where they need to be flattened but that is normal I guess. I have also seen a lot of time sharpening simply due to the fact that I was learning, trying different edge angles, etc. Now I don't spend much time sharpening because I can keep my knives sharpvery quickly. I don't think I'll ever have a "wear out" issue due to my light use compared to the stones in a shop that provides sharpening services.