There's a ton of factors involved in edge longevity: the steel, grind, bevel angle, shaving technique, beard prep, etc. I don't personally go for any edge life records. When an edge seems to have lost just a little bit, I like to take a handful of strokes on the C12k with a trip on the chomeox strop just to smooth it out. To be fair, all but 2 of my current rotation were hone by some of the best out there. But as Glen said, once they are sharp it's easy to keep them that way. I use a 10+/- razor rotation and I have some razors that have gone a year+ without needing any significant re-honing.