I've owned vehicles with some windshields that are much closer to 90 degrees than our trucks. Jeep Wranglers are one example of such a vehicle, and there are many more. How deep the dashboard goes is the first sign of how much angle is on the windshield. I can remember a truck I had back in the 80's. The dash was about 8" deep, similar to a Jeep Wrangler. I never even got a crack in the windshield of that truck. Maybe it was luck, but still, that windshield was very steep.
The angle on our windshields are on par with most other vehicles. If other vehicles are not getting cracked windshields due to the angle then there's no reason ours should be either. It has to be something else, such as inferior glass, or just bad luck.