Knife has always been a bit of a black sheep in my collection. On the plus side, it's useful, cheap, and everyone can take it. On the other hand, the investigators with high have better weapons in-faction, and the investigators with low aren't getting enough of a boost from Knife to make a difference.
And then we got the release of William Yorick, master knife thrower. Recurring Knife was always a possible option with Scavenging, but Yorick doesn't require the setup of finding scavenging nor the need to investigate. Just pay one resource each time you finish off an enemy with a 6, 2 damage test. Compare this to the .45 Automatic, which gives you one 5, 2 damage test per resource spent, and also requires you invest the four resources up front.
Yes, Yorick can only only recur the Knife once per turn using his ability, but this is easily mitigated. Enemy has too much health? Wear it down with your gun of choice and finish it off with your Knife, conserving ammo (or, just have two knives!). Draw an unlucky and lose your Knife? Scrounge for Supplies to get it back, or if you have some XP under your belt play Eucatastrophe to land the hit and recover both your Knife and the Eucatastrophe. (or, just have two knives! There are very few problems that Yorick cannot solve with a second Knife).
Does all this make Knife a good card? No, not really. Guardians will prefer Survival Knife, Rouges will prefer Switchblade, other Survivors will prefer Fire Axe, Mystics will prefer Shrivelling and Wither, and Seekers will prefer another player some save them and their fragile tools.
But if you want to roleplay a humble gravedigger, a man who trained himself in the art of blade throwing over a lifetime of lonely cemetary nights with only headstones for target practice, a man who has no qualms retrieving his weapons from the withered corpse of his victim only to turn around and hurl it into the skull of a ghoul stalking him in the night... in that case, Knife is the perfect card.