Same thing here. Slid on black ice in the north-east USA winter. Big -big- hit to the side of the helmet, road-slide for 100 feet and got up with a bruised ego.

I'd add 1 point for the pads, shoulder elbow and back for impact. Mine happen to be `D3o` and are comfortable

That's a big factor for me, my leather jacket is tough as nails, and has eaten one slide before with only minor scuffs.

But my synthetic jacket has armor as well, and while thankfully I have never tested it, it should provide pretty good protection even if the nylon burns through.