Separation
Just tell me why, in this day and age, we are navigating using GPS updated FMS data so we are almost guaranteed to be flying right over the top of each other. Why? Because technology can do it. It is a mindless, senseless use of technology. If we were really looking at aircraft safety, lateral as well as vertical separation would make a whole lot of sense. In years gone by, prior to TCAS, mid air's were avoided simply because aircraft were never exactly on track. I fly 1 or 2 miles right of track but ATC hate it. Doesn't suit their system apparently. It used to be that they were there to assist pilots but is seems these days that we are there for their benefit. I've lost count of the number of times I get asked when I'll be returning to track. I won't be. For goodness sake, make the airway 10 miles wide and within that, leave us alone! Having had a serious wake turbulence encounter I encourage all to do the same. One less hole in the Swiss cheese.