The question of cost for a tip is of course interesting. Many people lack the ability or desire to install their own tips, so the cost of the install will often be close to that of the tip itself or at least a substantial part of the overall cost. When you factor in the time that the tip will be used, the cost isn't all that great, no matter which tip you choose. This is also the case with "premium" chalk. It's just the principle of the thing! 20-30 dollars for a tip is way over the top, psychologically speaking. Since I install my own tips, the cost is next to nothing for a Triangle or a LePro, and if at any time I'm in doubt about the tip, I'll tear it off without a second thought, which I wouldn't necessarily do with a Kamui.
Then there is the case of the performance. In pool we have a major drawback in that it's very difficult to do a proper blind test of tips. You'd need identical shafts (when was the last time you came across those) and tape over the sides etc. etc. The whole thing becomes much more effort than anyone realistically wants to put in. In my personal experience (for what that's worth) I find that the best layered tips do seem to perform slightly better at the start of their life, then performance starts degrading rapidly. Single layer tips do get harder, slowly, but they perform close to the same (though harder) until they are worn down to nothing. That's what I want. I much prefer predictable high performance to a tip that's sometimes great and then turns to crap. I don't want to think about the tip at all, that's what I want out of it. If I'm shooting a slow, touchy draw shot, the last thing I'd want going through my mind is the current state of the tip, other than chalk retention, which of course must be considered no matter which tip type you like.