I've been carrying Kershaw knives on and off since the very late 90s. I haven't noticed any big decline. They still stand behind their products. Just like around the turn of the century, I can call them and get a real person on the phone. They'll still send me replacement parts like clips or torsion bars for free. As far as steel, I actually remember being excited about their use of 8Cr13Mov back in the day. (I had some Kershaws in AUS-6 and it seemed like a step up.) The problem today is that Kershaw just seems behind the times. They're still using 8Cr13Mov in Chinese-made knives at prices where China-direct manufacturers are using steels like Chinese D2, 14C28N, or Acuto 440.
The 3Cr and 4Cr stuff is just deplorable. The China-direct price analog for those is 8Cr13Mov now. Heck, even a lot of the similarly priced knock-offs and counterfeits coming out of China now seem to be running at least 5Cr.
Following from the above, I'm all set on Chinese D2. The market is flooded with it. It's routinely available for the same price as their current 8Cr13Mov models. If Kershaw wants to "upgrade" existing knives, I'd like to see something different. That's doubly true for sprint runs.