[matthewmacleod]

No, it’s not ridiculous. It’s complex, time consuming, and expensive to retrofit fully automated systems on to existing lines. Like any other project, the costs (disruption, financial) must be balanced with the gains (capacity, safety). Automated systems will continue to be rolled out worldwide at a reasonable pace.

[icebraining]

I think Swizec's point is that the current pace, even accounting for those factors, is not reasonable. Let's not pretend those decisions have some sort of mathematically correct answer; how much to invest in public transit, for example, is a political choice that one can legitimately disagree with - and even find unreasonable.