Animate cloth stitching toggle (preferably by vertex pairs)

Why not set the stitching toggle to be animatable?

On a basic level, it would be usable as an unfastening tool, but if it was animatable per vertex pair (stitch), it would allow for tearing and unfastening by use of canvas painting/brushing and/or proximity empties.

Alternatively a cutting tool for cloth during a sim would be awesome.