Thomas and Kershaw don't deserve the kind of crap that was thrown out here. Understand they're a production company- every now and then a bad one escapes just about every company. Assuming the Blur in question was really all that bad to begin with. Not a fan of the Blur design, but the Leeks I've had in 440A were razors (Largely due to blade profile and the angle of the secondary bevel, granted), and edge retention was not at all bad for something like 440A.
If it's edge retention you want, get yourself some tool steel or Crucible super-stainless. Or ZDP189.
Amen to that.
I've got a leek in trusty old 440A, and while it may not be S30V, with a very minimum of attention, it'll cut every time you need it to. With the amount I use my EDC, I could carry my leek for six months with only a stropping here and there before I had to touch up the edge. It's not the world's best steel, but hey, it works just fine on the leek and the Buck 110, and most kitchen knives would be lucky to be 440A.
Cut kershaw some slack and believe that a bunch of knuts wouldn't recommend their products if they sucked.
Oh, almost forgot to mention:
Used a Vapor II as a beater for who knows how long, then as my EDC on the jobsite when doing construction work, and then as the around-the-house beater for yardwork, cement work, construction and deconstruction, and after wearing out the pivot, stop pin, breaking the pocket clip, giving the blade a permanent slight bend, and stripping the handle screws, when I had beat on this thing so much that the lock was engaging on air, kershaw sent me out new parts for it, I installed them all, and it's good as new (well, it's scratched to hell, but it still cuts all day long, sharpens up easily, and just works.
Kershaw makes knives that even I can't kill, and then when I've put them through enough to make any knife cry "uncle", they send out parts to make it better. I'll always stand by kershaw, because they stand by their customers.