For a very sturdy all-purpose, quick deploying blade, I have carried the ZT0350 for six years now. It opens easily, has a very sturdy liner lock. It's so sturdy that I can use it as an impact weapon in closed position if I'm in an ambiguous self defense scenario.
I wish it were lighter. I do carry it on trail runs clipped to my shoulder harness for quick access. It's the only thing I carry that isn't optimized for lightness, but I know it well, so I keep going back to it. The only modification I've made to it is an after-market deep carry clip because the tip down carry position with the stock clip left a lot of it exposed above the line of my pocket and I would get comments every now and again.
I don't like the idea of multiple knives and multiple handguns. One of each for me. Train and carry, same gear for years. Almost everything that matters in a high-need situation will come down to me. I don't want to worry about what I happen to be carrying at any given moment.