Out of sheer curiosity, I decided to put the replaceable cutters and non-replaceable cutters head-to-head in real-world cutting tasks. Cutting hardened nails is ridiculous, so I used stuff you would probably be cutting in the real world.
#8 60LB Jack Chain.
55LB Mild Steel Wire.
200LB Hard Steel Wire.
18g-2 Stranded copper wire.
and zip ties to make sure the cutters weren't damaged.