[ghaff]

>but that has long moved to air freight

Well, not even air freight. How much extremely time-sensitive information is actually transported physically these days?

I have a few things like my tax return but most of what I deal with these days is sent electronically if it's really urgent.

[bobthepanda]

Mail services also included small parcels, and if anything those continue to need ever faster logistics.

When we talk about air vs rail we are talking about hours and days vs. days and weeks.

[ghaff]

Fair enough. The transfer of information has moved online to a significant degree. But the transfer of small/light physical stuff has definitely moved into shorter latency territory.