I too recall making several cross border train trips on the strength of nothing more than my high school student ID. A different era, to be sure.
I don't see the pendulum swinging back anytime soon. The non-fantasy border crossings that are being worked on are certainly complicated by current thinking.
But - the processes are definitely improving. Nexus is the best $50 I ever spent, and TSA Pre-check in the US makes air travel much smoother than the immediate Post-911 era.
I would not wax poetic about Eurostar formalties, either...it's not all peaches and cream across the pond.
- Paul