This story is so unbelievably sad!

> That leaves the question of automatic emergency braking: why didn’t the truck slow or stop itself before hitting stationary vehicles at a lit intersection? AEB is designed for exactly this scenario — it detects vehicles or obstacles in the truck’s path and applies the brakes when a collision is imminent, regardless of driver input. Most modern Class 8 trucks are already equipped with collision-mitigation systems from suppliers like Bendix and Detroit Assurance

So Tesla made a decision to make their semi less safe than the average for the vehicle class.

They could have had basic safety equipment, but they wanted to save a buck. Now two people are dead and another is almost dead. This is gross negligence on the Tesla semi truck’s engineering team and the executive leadership.

It has the feature; but it failed to function. The design wasn't cheap, it was incompetent.