Windshields are the most important for conserving the structural integrity of a auto; they reinforce the roof in the time of a rollover

https://direct-wiki.win/index.php/How_Long_Does_It_Take%3F_Timelines_for_Various_Auto_Glass_Services

Windshields are necessary for putting forward the structural integrity of a vehicle; they make stronger the roof throughout a rollover coincidence, retaining occupants.