S90V is an interesting steel. Very high edge holding, but very difficult to work with and sharpen. I made several Shechita/Chalef (Kosher slaughtering knives) in the steel and they are basically Nakiri shaped rectangles and very thin. I ground 2, 18" x 2.5" wide Shechita and 4, 5" x 2" wide Shechita. I ground and sharpened them on my 2x72 and then refined that edge with Shapton Glass 500, Bester 1200 and Rika 5K waterstones and then used a 14 micron and 3 micron Diamond emulsions on leather strops. They were pretty sharp after the Rika 5K stage, so the stropping was more refining than anything. The other water stones worked on them, but due to the size and flex of the knives, took a while. Sharpening 18" of anything will take a while! The 5" ones were much easier to sharpen. I carry a S90V fixed blade as my EDC and have taken it to the sharpening stones only once in just under a year. The Strop keeps the edge nice and sharp. I made a few other edc's in S90V with 3-4" blades and sharpening on the water stones isn't bad at all. Diamonds make it faster, but the Shapton Glass Stones work very well on highly alloyed steels. Shorter height blades and shorter length blades work pretty well, but long, thin blades are not the best in S90V.
Kitchen knives usually need thinning down the road and if you need to do chip repair, I would want a variable speed 2x72 for S90V. You would not want to do those tasks with stones! When I got close to done with the Shecita, I noticed a lot of flex in the blade when grinding, so it was hard to get it nice and thin without overheating the steel. I had to wet the belts and blades a lot; most belts won't cut very well without some pressure on the hardened S90V. EDC blades aren't as tall, so they don't flex as much to cause an issue. Something like a thin chef knife or Nakiri will flex a lot and be much harder to grind, especially post HT. Getting a nice finish on the blade is a lot more difficult, too for the same reasons. Belts go dull quicker and start burnishing the steel. I could see reflections from 80 and 120 grit belts when they started burnishing. Ceramic or SiC finishing belts were needed.
Aogami Super barstock is hard to get outside of Japan, which is why many do not work with it. Some of the european steels are similar with more alloys in them. You can look for something in Apex Ultra (high hardness carbon steel), M4, CPM CruWear, etc if you want a carbon steel with better edge retention. Or Magnacut if you want something in Stainless, but with excellent edge holding and easier to sharpen than S90V.
