Interesting observations.
I go back and forth between a medium Spyderco and my Queen stockman as my main user EDC, alway send up going with the Spyderco. Some of my thoughts:
-Stockman is a PITA the use in below freezing temps or with hand injuries. Doesn't matter much if you have a fixed blade though.
-I can usually have what needs cut and my Spyderco back in my pocket by the time I'd have my stockman open and ready to use. Not a deal breaker, but when presented with the two options I opt for the most convenient.
-I don't like the narrow blades of my stockman as much overall. Great for getting into tight spots, but the broader spyderco blades offer more control in a cut for me.
-The stockman cuts well after putting a good edge on it, but all my Spydercos cut equally as well if not better after reprofiling the edges. Some steels they used will hold a thinner edge than a lot of common traditional steels in my experience. I don't care much for the point of traditionals cutting better, because anyone willing to invest 15 minutes of their time with a diamond hone can make a Spyderco cut just as well.
-The lack of a lock has never bothered me with my Spydercos (UKPK, TMag, Bug) or traditionals. A lot of people my age consider it unsafe, but I've never had a problem with slipjoints. In fact I've carried them longer than I've carried lock blades, by far.
-In theory I'd imagine the stockman to be more presentable in public, but I've never gotten as much as a raised eyebrow using my Military in public. I do use responsibly though, never making any commotion about what I'm doing, just cutting what needs cut and moving on with life. I've cut apples with a Delica or Endura at work in front of large groups of "liberal" women and the like, without anyone looking at me funny or talking to me less. I think it has more to do with attitude really.
-I've tried the slipjoint and fixed blade thing. I found that this combo didn't really do anything better for me than a single Spyderco. Yes, the extra strength of a FB is nice assurance, but it never came into use. Yes, having 3 blades to dull on my stockman is nice, but I never get my Spydercos so dull in a single day that they can't perform. So the advantages don't do much for me. It is nice knowing you can use say the spey for breaking down a lot of cardboard, then have the main blade hair popping sharp for food use or similar, but in practice I get by with a single chunk of S30V, BG42 or ZDP189 just fine.
-I think some slipjoints are extremely attractive in appearance. That said, I like looking at my Spydercos too, because they have a purpose driven beauty of their own. To me the UKPK for example is extremely elegant, because of how minimal the overall appearance is and how essential every single part is to the design.
-While the queen in D2 performs well, I haven't used a traditional yet that meets or exceeds the performance of my ZDP189 blades in terms of edge retention and stability under acute edges. Maybe I should look into a wharncliffe ZDP189 custom slipjoint in the future
that said I like seeing things like
this. No reason both can't be appreciated.