I have some better quality kitchen knives I like keeping sharp.
I use a two-sided whetstone 400/2000 grit for basic shaping (400 is akin to those rolling sharpeners, to be used only when you fucked up real bad), a leather strop with green sharpening paste (~6000-8000 grit) glued to a piece of wood, a plain leather strop, and a honing steel.
Green sharpening paste is most of what I ever use, a couple of strokes weekly (more realistically about 20 once a month), and maybe polish it up with the plain leather strop. Keeps the knives wicked sharp, and then I just hone them after each use.
Sometimes I do stupid things and get burrs in my edge (like cleaving frozen bone), that’s where the 2000 grit saves me.
400 I guess is for when the apocalypse comes or your kids decided to practice chef’s knife throwing into scrap metal. It’s nice to know I can remake a whole edge, but rarely used.
This also seems a convenient bit of propaganda, of course they would say that to scare the Russians.
If it’s true, it’s a really cool feat of engineering though! Can’t wait for the fog of war to lift and see what cool civilian applications all this drone tech will have.