The windshield glass, no problem wit that, you simply need to know how operate the gluing.
Yes, true … but years ago !
Today the windshield is not only glass, it’s a major cockpit component.
The HUD, the video cameras are grafted on. Calibrating those is an absolute must.
Some basically alert on a lane departure. No need for high accuracy, except if a bike happens to move between the lanes !
Others… are correlated in the EB emergency braking System with the radar sensor ! Which means the difference between stopping in front of the wall, or within the wall…
How to explain to the customer that the calibration was forgotten, when a 15€ method and the proper equipment will achieve it ?