Those system still seem to have some obvious safety issues... Yes, the convoy vehicles can all brake in unison, but what about mechanical failures that would slow the vehicle faster than trailing vehicles could safely brake?
While I can't think of a single incident of a jumbo jet experiencing a spontaneous catastrophic failure during a flight mode when drafting would be useful (@ cruising altitude, in clear weather, etc); I'm sure such events have and will occur. Doubling or tripling the possible number of casualties in such an incident seems like something that should be given a whole lot of thought... (fortunately it looks like they're doing just that)
While I can't think of a single incident of a jumbo jet experiencing a spontaneous catastrophic failure during a flight mode when drafting would be useful (@ cruising altitude, in clear weather, etc); I'm sure such events have and will occur. Doubling or tripling the possible number of casualties in such an incident seems like something that should be given a whole lot of thought... (fortunately it looks like they're doing just that)