To be fair, the reliability threshold had better be extremely high for systems controlling a 2 ton box going 120 km/hr surrounded by other boxes of similar velo

To be fair, the reliability threshold had better be extremely high for systems controlling a 2 ton box going 120 km/hr surrounded by other boxes of similar velocity. There's plenty of room for reasonable discourse about where exactly that threshold should be. I suspect most of us (myself included) are also probably not familiar with how reliable modern iterations of this technology are.