OK, so you inspired me to walk a extra mile. I have been shaving with the same Nacet blade since Apr 6 . It already had a couple of shaves on it. I prepped and prepped and been paying attention with the angle of the blade. I did prolong the blade's life with 3-4 shaves. That is for sure. The last couple of shaves have not been good. Leaving me with some stubble here and there. For Christmas I gave my much younger brother (he sometimes borders on being a hipster) a very basic DE starter set with the old school feel he would like. Only shop-available soaps and lotions and a Lord L6 with an Omega brush. We have very different skin and growth. He is very blond with light growth. I am the opposite (not same biological father). My beard on the other hand would look like Popeye's enemy Brutus. Not a pretty beard (so i never kept it for long). Point is, my brother can use the same blade for a month and still be OK with it. There is no way I can get ten efficient shaves out of a blade. Especially after my beard went gray. It then became even more "unruly" and hard to cut. I believe you are right that you can do a lot of things to get more life out of your blades, but at the end of the day, we are also somewhat different by nature, and that matters quite a lot. Between us, me and my brother have about 9 shaves per blade, and that is not to shabby.When my technique got better I found that the blades were getting binned way before they needed to be. I went from three shaves, to six shaves, to twelve, to thirty. I usually bin them at 12 now as I'm using 12 sided die to track the shaves. Could I take a blade to 100 shaves, probably so, but I don't need to. Twelve is plenty for me, from a Feather blade. Given the cost of a blade I don't need to pull every last shave from every blade.