I broke a 1/4 glass in a Ford Probe about 35+ years ago and it cost me over $1,100 then. I put my hand thru it when I was installing it didn’t have the line up pin properly located and when slapped with the palm of my hand to set it, it shattered into what looked like salt rocks
Sounds like it was tempered glass. I slung a rock with a weedeater into the side window on a 89 or 90 model Ford Ranger once. I found glass EVERYWHERE in that truck.
Tempered glass was used in the corner windows of the Chevy AD pickups in the '50s. So, it is traditional.