It’s actually kind of problematic, since tempered glass is an important safety feature in cars. It’s strong and resists impacts, but when hit with the right kind of tool will shatter into small ‘cubes’ that don’t have sharp and dangerous shards. Without safety glass it’s much harder to rescue people that are trapped in a vehicle, you basically have to hammer on the shatterproof glass for several minutes which you might not have if the car is sinking in water, near a fire, exposed to dangerous chemical spills, etc. Honestly, I don’t think that design for ‘cybertruck’ would be approved by US regulatory standards.