What KV Key does 

Draw a line, a ring, or paint a boundary in the viewport to place the cut — split into two, or into many pieces at once 

Manual booleans leave open holes to patch  -  The cut is sealed automatically (flat, tapered dome, or trapezoid dome) 

The halves don't line up and need glue - Male pegs and female sockets are generated on the cut with print clearance — they snap into place 

Booleans crash on million-face scans - A bmesh/voxel-based pipeline, plus a low-poly proxy so you can tune parameters fast 

Scans are broken and non-watertight - Built-in voxel remesh and "separate into individual objects" preprocessing 

You can't tell if the model is solid or hollow - Live cut view: slice it open with a cut box in real time, without creating new objects