Out of the roughly 200 blades I own, there's probably 4-6 that I wouldn't actually use, because they're just collector pieces. The rest get rotated into use eventually, rotated into location knives (kitchen, shop, shed, etc) for regular use, or set aside for specialty uses when that need arises. Having a rural woodlot and dealing with a lot of cardboard from incoming stock for my shop does mean that I have a lot more opportunity to carry and use knives than when I was living downtown in an apartment. It still means that some knives get used a lot more than others.
Today I've used my MKM Maniago Isonzo, Joker Lynx, Kizer Vanguard Mini Sheepdog (shop), Ontario Knife RAT Model 1 (kitchen), and Leatherman SkeleTool CX, as well as a Santoku and paring knife in the kitchen.