I think it's a really useful innovation. It does remind me of the 3- fingered carpenter who was explaining to his friend how he lost his fingers. "Well, I was guiding the plywood into the blade like this and...Oh, shit! There goes another finger!"

I almost lost my thumb today but it wasn't with the chop saw. I was trimming a ragged end with a hand saw and managed to give my thumb a slice as it slipped. Now what's left of my thumb is all wrapped up in duct tape and bag balm.

Cheerily,
Charley "4-Finger" Noble