I really don't understand the point of the OPs post...seems pretty simple to me...get father back or don't ride on rock filled roads right?i could understand his concerns if it just cracks all of a sudden with nothing hitting it.his habits havent changed but others may have and his roads are more filled with debris.this does seem more like a frustrating rant for him and i get that for sure along with a conversation starter piece for us to share our experiences.i didn't notice if he came back to chat or not(could have and I missed it but I m not going back to check)
Now mine/ours.
Wife's '03 4runner windshield cracked over night sitting in the driveway.wasnt there when she came home,next morning like a 10in.crack running sideways,i saw it clear as day next morning walking to my truck(i leave before her)...went back in and asked her about it.pass.side middle of window.now science would dictate something like temperature,vibration,stress something who knows.no hit on the outside(smooth as glass...lol),checked the cameras on house when i got home,no one entered the property,no giant load of petrified birds%$#,no animal was on the car,no trees for anything to fall out of,invisible aliens that had a beef with her windshield?florida does have a bunch of reports on alien sightings here..lol..I've seen 2 unexplainables with witness' beside me but that's a whole other can of worms to open up.
myself?,i would lean toward the temp.thing but this thing was 20 years old at the time so its had plenty of time to see more than likely every kind of possible heat/cold stress situation,so why?defective glass manufactering?after 20 years?doubt that..who knows and I'll never know.
Im open to thoughts from everyone on it.and dont go raggin on me about my aliens..lmao
But I aint losin sleep over it.
Little long but thats my experience on a windshield.