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by modeless 2471 days ago
The glass will almost certainly break in a rollover crash. But it's laminated safety glass, so it won't be dangerous. More importantly, the metal frame of the roof acts as a roll cage, and that's what IIHS tests the strength of. They're not really testing the glass.

See pictures of a rolled over Model 3 here: https://electrek.co/2018/07/15/tesla-model-3-rollover-crash/ The glass is broken but the rigid metal frame clearly protected the occupants from harm.