One thing that might reduce the beta test time is a few major accidents involving 10+ vehicles. That could cause a push for legislation requiring more stringent testing.

I don’t know how much they currently test for bad behavior from other drivers like unexpected lane changes, sudden stops, and combinations currently. I imagine that would require a large testing facility and a bunch of cars they can wreck repetitively. It wouldn’t be cheap.

I don’t think they can just use /r/IdiotsInCars for training.