My 45 y.o. Camillus TL-29 is a bit more legal now with this decision. Hold the folded blade with thumb and forefinger with the hinge in the palm and it will drop open, with the razor-sharp tip positioned for precision work. But it's out in the toolbox.
My EDC CRKT M16 Z1 was designed as a switchblade and use has smoothed the action. The blade alloy is the nicest I have ever had. The tiny Torx fasteners are about worn out for disassembly-reassembly cleaning, polishing and sharpening. It's better to cherish what you have than have what you want.