I'm all for it and do so myself almost every day.
I'm not a knife collector, amassing 10, 20, or 30 knives holds very little appeal to me. A small handful is all I need and I prefer to carry just one or two at the most. I have an Erickson stag EDC pattern (single spear blade on a trapper style frame, see my avatar) that you will find in my pocket most days...when it's not there you'll typically just find a SAK Pioneer because I'm expecting to need the additional tools and didn't feel like carrying two knives.
Sure, it's an expensive knife...but if you're going to spend that much on a knife then I think you should thoroughly enjoy it to the fullest, and the only way to do that (to my mind) is to carry and use it. It's taken me a while to come to this realization but a knife in a drawer just doesn't make me happy in the long run, just seems like a waste of money for me....but I don't have that collector mindset that some people have.
I have new 2-blade from Ken coming in the near future, my first custom ordered multi-blade, and the day it arrives it will be dropped into my pocket without hesitation (yes, I'll make sure that pocket is empty first though). That will make two custom Ericksons and a handful of Alox SAKs....and that is enough for me. I will carry and use them and be happy. I do have some GECs right now but I plan on selling all but my old beater #15 which I'll toss in my tool box.